Standard input is empty

ABC
ABD
ACD
BCD
ABE
ACE
BCE
ADE
BDE
CDE
ABF
ACF
BCF
ADF
BDF
CDF
AEF
BEF
CEF
DEF
ABG
ACG
BCG
ADG
BDG
CDG
AEG
BEG
CEG
DEG
AFG
BFG
CFG
DFG
EFG
ABH
ACH
BCH
ADH
BDH
CDH
AEH
BEH
CEH
DEH
AFH
BFH
CFH
DFH
EFH
AGH
BGH
CGH
DGH
EGH
FGH
ABI
ACI
BCI
ADI
BDI
CDI
AEI
BEI
CEI
DEI
AFI
BFI
CFI
DFI
EFI
AGI
BGI
CGI
DGI
EGI
FGI
AHI
BHI
CHI
DHI
EHI
FHI
GHI
ABJ
ACJ
BCJ
ADJ
BDJ
CDJ
AEJ
BEJ
CEJ
DEJ
AFJ
BFJ
CFJ
DFJ
EFJ
AGJ
BGJ
CGJ
DGJ
EGJ
FGJ
AHJ
BHJ
CHJ
DHJ
EHJ
FHJ
GHJ
AIJ
BIJ
CIJ
DIJ
EIJ
FIJ
GIJ
HIJ
ABK
ACK
BCK
ADK
BDK
CDK
AEK
BEK
CEK
DEK
AFK
BFK
CFK
DFK
EFK
AGK
BGK
CGK
DGK
EGK
FGK
AHK
BHK
CHK
DHK
EHK
FHK
GHK
AIK
BIK
CIK
DIK
EIK
FIK
GIK
HIK
AJK
BJK
CJK
DJK
EJK
FJK
GJK
HJK
IJK
ABL
ACL
BCL
ADL
BDL
CDL
AEL
BEL
CEL
DEL
AFL
BFL
CFL
DFL
EFL
AGL
BGL
CGL
DGL
EGL
FGL
AHL
BHL
CHL
DHL
EHL
FHL
GHL
AIL
BIL
CIL
DIL
EIL
FIL
GIL
HIL
AJL
BJL
CJL
DJL
EJL
FJL
GJL
HJL
IJL
AKL
BKL
CKL
DKL
EKL
FKL
GKL
HKL
IKL
JKL
ABM
ACM
BCM
ADM
BDM
CDM
AEM
BEM
CEM
DEM
AFM
BFM
CFM
DFM
EFM
AGM
BGM
CGM
DGM
EGM
FGM
AHM
BHM
CHM
DHM
EHM
FHM
GHM
AIM
BIM
CIM
DIM
EIM
FIM
GIM
HIM
AJM
BJM
CJM
DJM
EJM
FJM
GJM
HJM
IJM
AKM
BKM
CKM
DKM
EKM
FKM
GKM
HKM
IKM
JKM
ALM
BLM
CLM
DLM
ELM
FLM
GLM
HLM
ILM
JLM
KLM
ABN
ACN
BCN
ADN
BDN
CDN
AEN
BEN
CEN
DEN
AFN
BFN
CFN
DFN
EFN
AGN
BGN
CGN
DGN
EGN
FGN
AHN
BHN
CHN
DHN
EHN
FHN
GHN
AIN
BIN
CIN
DIN
EIN
FIN
GIN
HIN
AJN
BJN
CJN
DJN
EJN
FJN
GJN
HJN
IJN
AKN
BKN
CKN
DKN
EKN
FKN
GKN
HKN
IKN
JKN
ALN
BLN
CLN
DLN
ELN
FLN
GLN
HLN
ILN
JLN
KLN
AMN
BMN
CMN
DMN
EMN
FMN
GMN
HMN
IMN
JMN
KMN
LMN
ABO
ACO
BCO
ADO
BDO
CDO
AEO
BEO
CEO
DEO
AFO
BFO
CFO
DFO
EFO
AGO
BGO
CGO
DGO
EGO
FGO
AHO
BHO
CHO
DHO
EHO
FHO
GHO
AIO
BIO
CIO
DIO
EIO
FIO
GIO
HIO
AJO
BJO
CJO
DJO
EJO
FJO
GJO
HJO
IJO
AKO
BKO
CKO
DKO
EKO
FKO
GKO
HKO
IKO
JKO
ALO
BLO
CLO
DLO
ELO
FLO
GLO
HLO
ILO
JLO
KLO
AMO
BMO
CMO
DMO
EMO
FMO
GMO
HMO
IMO
JMO
KMO
LMO
ANO
BNO
CNO
DNO
ENO
FNO
GNO
HNO
INO
JNO
KNO
LNO
MNO
ABP
ACP
BCP
ADP
BDP
CDP
AEP
BEP
CEP
DEP
AFP
BFP
CFP
DFP
EFP
AGP
BGP
CGP
DGP
EGP
FGP
AHP
BHP
CHP
DHP
EHP
FHP
GHP
AIP
BIP
CIP
DIP
EIP
FIP
GIP
HIP
AJP
BJP
CJP
DJP
EJP
FJP
GJP
HJP
IJP
AKP
BKP
CKP
DKP
EKP
FKP
GKP
HKP
IKP
JKP
ALP
BLP
CLP
DLP
ELP
FLP
GLP
HLP
ILP
JLP
KLP
AMP
BMP
CMP
DMP
EMP
FMP
GMP
HMP
IMP
JMP
KMP
LMP
ANP
BNP
CNP
DNP
ENP
FNP
GNP
HNP
INP
JNP
KNP
LNP
MNP
AOP
BOP
COP
DOP
EOP
FOP
GOP
HOP
IOP
JOP
KOP
LOP
MOP
NOP
ABQ
ACQ
BCQ
ADQ
BDQ
CDQ
AEQ
BEQ
CEQ
DEQ
AFQ
BFQ
CFQ
DFQ
EFQ
AGQ
BGQ
CGQ
DGQ
EGQ
FGQ
AHQ
BHQ
CHQ
DHQ
EHQ
FHQ
GHQ
AIQ
BIQ
CIQ
DIQ
EIQ
FIQ
GIQ
HIQ
AJQ
BJQ
CJQ
DJQ
EJQ
FJQ
GJQ
HJQ
IJQ
AKQ
BKQ
CKQ
DKQ
EKQ
FKQ
GKQ
HKQ
IKQ
JKQ
ALQ
BLQ
CLQ
DLQ
ELQ
FLQ
GLQ
HLQ
ILQ
JLQ
KLQ
AMQ
BMQ
CMQ
DMQ
EMQ
FMQ
GMQ
HMQ
IMQ
JMQ
KMQ
LMQ
ANQ
BNQ
CNQ
DNQ
ENQ
FNQ
GNQ
HNQ
INQ
JNQ
KNQ
LNQ
MNQ
AOQ
BOQ
COQ
DOQ
EOQ
FOQ
GOQ
HOQ
IOQ
JOQ
KOQ
LOQ
MOQ
NOQ
APQ
BPQ
CPQ
DPQ
EPQ
FPQ
GPQ
HPQ
IPQ
JPQ
KPQ
LPQ
MPQ
NPQ
OPQ
ABR
ACR
BCR
ADR
BDR
CDR
AER
BER
CER
DER
AFR
BFR
CFR
DFR
EFR
AGR
BGR
CGR
DGR
EGR
FGR
AHR
BHR
CHR
DHR
EHR
FHR
GHR
AIR
BIR
CIR
DIR
EIR
FIR
GIR
HIR
AJR
BJR
CJR
DJR
EJR
FJR
GJR
HJR
IJR
AKR
BKR
CKR
DKR
EKR
FKR
GKR
HKR
IKR
JKR
ALR
BLR
CLR
DLR
ELR
FLR
GLR
HLR
ILR
JLR
KLR
AMR
BMR
CMR
DMR
EMR
FMR
GMR
HMR
IMR
JMR
KMR
LMR
ANR
BNR
CNR
DNR
ENR
FNR
GNR
HNR
INR
JNR
KNR
LNR
MNR
AOR
BOR
COR
DOR
EOR
FOR
GOR
HOR
IOR
JOR
KOR
LOR
MOR
NOR
APR
BPR
CPR
DPR
EPR
FPR
GPR
HPR
IPR
JPR
KPR
LPR
MPR
NPR
OPR
AQR
BQR
CQR
DQR
EQR
FQR
GQR
HQR
IQR
JQR
KQR
LQR
MQR
NQR
OQR
PQR
ABS
ACS
BCS
ADS
BDS
CDS
AES
BES
CES
DES
AFS
BFS
CFS
DFS
EFS
AGS
BGS
CGS
DGS
EGS
FGS
AHS
BHS
CHS
DHS
EHS
FHS
GHS
AIS
BIS
CIS
DIS
EIS
FIS
GIS
HIS
AJS
BJS
CJS
DJS
EJS
FJS
GJS
HJS
IJS
AKS
BKS
CKS
DKS
EKS
FKS
GKS
HKS
IKS
JKS
ALS
BLS
CLS
DLS
ELS
FLS
GLS
HLS
ILS
JLS
KLS
AMS
BMS
CMS
DMS
EMS
FMS
GMS
HMS
IMS
JMS
KMS
LMS
ANS
BNS
CNS
DNS
ENS
FNS
GNS
HNS
INS
JNS
KNS
LNS
MNS
AOS
BOS
COS
DOS
EOS
FOS
GOS
HOS
IOS
JOS
KOS
LOS
MOS
NOS
APS
BPS
CPS
DPS
EPS
FPS
GPS
HPS
IPS
JPS
KPS
LPS
MPS
NPS
OPS
AQS
BQS
CQS
DQS
EQS
FQS
GQS
HQS
IQS
JQS
KQS
LQS
MQS
NQS
OQS
PQS
ARS
BRS
CRS
DRS
ERS
FRS
GRS
HRS
IRS
JRS
KRS
LRS
MRS
NRS
ORS
PRS
QRS
ABT
ACT
BCT
ADT
BDT
CDT
AET
BET
CET
DET
AFT
BFT
CFT
DFT
EFT
AGT
BGT
CGT
DGT
EGT
FGT
AHT
BHT
CHT
DHT
EHT
FHT
GHT
AIT
BIT
CIT
DIT
EIT
FIT
GIT
HIT
AJT
BJT
CJT
DJT
EJT
FJT
GJT
HJT
IJT
AKT
BKT
CKT
DKT
EKT
FKT
GKT
HKT
IKT
JKT
ALT
BLT
CLT
DLT
ELT
FLT
GLT
HLT
ILT
JLT
KLT
AMT
BMT
CMT
DMT
EMT
FMT
GMT
HMT
IMT
JMT
KMT
LMT
ANT
BNT
CNT
DNT
ENT
FNT
GNT
HNT
INT
JNT
KNT
LNT
MNT
AOT
BOT
COT
DOT
EOT
FOT
GOT
HOT
IOT
JOT
KOT
LOT
MOT
NOT
APT
BPT
CPT
DPT
EPT
FPT
GPT
HPT
IPT
JPT
KPT
LPT
MPT
NPT
OPT
AQT
BQT
CQT
DQT
EQT
FQT
GQT
HQT
IQT
JQT
KQT
LQT
MQT
NQT
OQT
PQT
ART
BRT
CRT
DRT
ERT
FRT
GRT
HRT
IRT
JRT
KRT
LRT
MRT
NRT
ORT
PRT
QRT
AST
BST
CST
DST
EST
FST
GST
HST
IST
JST
KST
LST
MST
NST
OST
PST
QST
RST
ABU
ACU
BCU
ADU
BDU
CDU
AEU
BEU
CEU
DEU
AFU
BFU
CFU
DFU
EFU
AGU
BGU
CGU
DGU
EGU
FGU
AHU
BHU
CHU
DHU
EHU
FHU
GHU
AIU
BIU
CIU
DIU
EIU
FIU
GIU
HIU
AJU
BJU
CJU
DJU
EJU
FJU
GJU
HJU
IJU
AKU
BKU
CKU
DKU
EKU
FKU
GKU
HKU
IKU
JKU
ALU
BLU
CLU
DLU
ELU
FLU
GLU
HLU
ILU
JLU
KLU
AMU
BMU
CMU
DMU
EMU
FMU
GMU
HMU
IMU
JMU
KMU
LMU
ANU
BNU
CNU
DNU
ENU
FNU
GNU
HNU
INU
JNU
KNU
LNU
MNU
AOU
BOU
COU
DOU
EOU
FOU
GOU
HOU
IOU
JOU
KOU
LOU
MOU
NOU
APU
BPU
CPU
DPU
EPU
FPU
GPU
HPU
IPU
JPU
KPU
LPU
MPU
NPU
OPU
AQU
BQU
CQU
DQU
EQU
FQU
GQU
HQU
IQU
JQU
KQU
LQU
MQU
NQU
OQU
PQU
ARU
BRU
CRU
DRU
ERU
FRU
GRU
HRU
IRU
JRU
KRU
LRU
MRU
NRU
ORU
PRU
QRU
ASU
BSU
CSU
DSU
ESU
FSU
GSU
HSU
ISU
JSU
KSU
LSU
MSU
NSU
OSU
PSU
QSU
RSU
ATU
BTU
CTU
DTU
ETU
FTU
GTU
HTU
ITU
JTU
KTU
LTU
MTU
NTU
OTU
PTU
QTU
RTU
STU
ABV
ACV
BCV
ADV
BDV
CDV
AEV
BEV
CEV
DEV
AFV
BFV
CFV
DFV
EFV
AGV
BGV
CGV
DGV
EGV
FGV
AHV
BHV
CHV
DHV
EHV
FHV
GHV
AIV
BIV
CIV
DIV
EIV
FIV
GIV
HIV
AJV
BJV
CJV
DJV
EJV
FJV
GJV
HJV
IJV
AKV
BKV
CKV
DKV
EKV
FKV
GKV
HKV
IKV
JKV
ALV
BLV
CLV
DLV
ELV
FLV
GLV
HLV
ILV
JLV
KLV
AMV
BMV
CMV
DMV
EMV
FMV
GMV
HMV
IMV
JMV
KMV
LMV
ANV
BNV
CNV
DNV
ENV
FNV
GNV
HNV
INV
JNV
KNV
LNV
MNV
AOV
BOV
COV
DOV
EOV
FOV
GOV
HOV
IOV
JOV
KOV
LOV
MOV
NOV
APV
BPV
CPV
DPV
EPV
FPV
GPV
HPV
IPV
JPV
KPV
LPV
MPV
NPV
OPV
AQV
BQV
CQV
DQV
EQV
FQV
GQV
HQV
IQV
JQV
KQV
LQV
MQV
NQV
OQV
PQV
ARV
BRV
CRV
DRV
ERV
FRV
GRV
HRV
IRV
JRV
KRV
LRV
MRV
NRV
ORV
PRV
QRV
ASV
BSV
CSV
DSV
ESV
FSV
GSV
HSV
ISV
JSV
KSV
LSV
MSV
NSV
OSV
PSV
QSV
RSV
ATV
BTV
CTV
DTV
ETV
FTV
GTV
HTV
ITV
JTV
KTV
LTV
MTV
NTV
OTV
PTV
QTV
RTV
STV
AUV
BUV
CUV
DUV
EUV
FUV
GUV
HUV
IUV
JUV
KUV
LUV
MUV
NUV
OUV
PUV
QUV
RUV
SUV
TUV
ABW
ACW
BCW
ADW
BDW
CDW
AEW
BEW
CEW
DEW
AFW
BFW
CFW
DFW
EFW
AGW
BGW
CGW
DGW
EGW
FGW
AHW
BHW
CHW
DHW
EHW
FHW
GHW
AIW
BIW
CIW
DIW
EIW
FIW
GIW
HIW
AJW
BJW
CJW
DJW
EJW
FJW
GJW
HJW
IJW
AKW
BKW
CKW
DKW
EKW
FKW
GKW
HKW
IKW
JKW
ALW
BLW
CLW
DLW
ELW
FLW
GLW
HLW
ILW
JLW
KLW
AMW
BMW
CMW
DMW
EMW
FMW
GMW
HMW
IMW
JMW
KMW
LMW
ANW
BNW
CNW
DNW
ENW
FNW
GNW
HNW
INW
JNW
KNW
LNW
MNW
AOW
BOW
COW
DOW
EOW
FOW
GOW
HOW
IOW
JOW
KOW
LOW
MOW
NOW
APW
BPW
CPW
DPW
EPW
FPW
GPW
HPW
IPW
JPW
KPW
LPW
MPW
NPW
OPW
AQW
BQW
CQW
DQW
EQW
FQW
GQW
HQW
IQW
JQW
KQW
LQW
MQW
NQW
OQW
PQW
ARW
BRW
CRW
DRW
ERW
FRW
GRW
HRW
IRW
JRW
KRW
LRW
MRW
NRW
ORW
PRW
QRW
ASW
BSW
CSW
DSW
ESW
FSW
GSW
HSW
ISW
JSW
KSW
LSW
MSW
NSW
OSW
PSW
QSW
RSW
ATW
BTW
CTW
DTW
ETW
FTW
GTW
HTW
ITW
JTW
KTW
LTW
MTW
NTW
OTW
PTW
QTW
RTW
STW
AUW
BUW
CUW
DUW
EUW
FUW
GUW
HUW
IUW
JUW
KUW
LUW
MUW
NUW
OUW
PUW
QUW
RUW
SUW
TUW
AVW
BVW
CVW
DVW
EVW
FVW
GVW
HVW
IVW
JVW
KVW
LVW
MVW
NVW
OVW
PVW
QVW
RVW
SVW
TVW
UVW
ABX
ACX
BCX
ADX
BDX
CDX
AEX
BEX
CEX
DEX
AFX
BFX
CFX
DFX
EFX
AGX
BGX
CGX
DGX
EGX
FGX
AHX
BHX
CHX
DHX
EHX
FHX
GHX
AIX
BIX
CIX
DIX
EIX
FIX
GIX
HIX
AJX
BJX
CJX
DJX
EJX
FJX
GJX
HJX
IJX
AKX
BKX
CKX
DKX
EKX
FKX
GKX
HKX
IKX
JKX
ALX
BLX
CLX
DLX
ELX
FLX
GLX
HLX
ILX
JLX
KLX
AMX
BMX
CMX
DMX
EMX
FMX
GMX
HMX
IMX
JMX
KMX
LMX
ANX
BNX
CNX
DNX
ENX
FNX
GNX
HNX
INX
JNX
KNX
LNX
MNX
AOX
BOX
COX
DOX
EOX
FOX
GOX
HOX
IOX
JOX
KOX
LOX
MOX
NOX
APX
BPX
CPX
DPX
EPX
FPX
GPX
HPX
IPX
JPX
KPX
LPX
MPX
NPX
OPX
AQX
BQX
CQX
DQX
EQX
FQX
GQX
HQX
IQX
JQX
KQX
LQX
MQX
NQX
OQX
PQX
ARX
BRX
CRX
DRX
ERX
FRX
GRX
HRX
IRX
JRX
KRX
LRX
MRX
NRX
ORX
PRX
QRX
ASX
BSX
CSX
DSX
ESX
FSX
GSX
HSX
ISX
JSX
KSX
LSX
MSX
NSX
OSX
PSX
QSX
RSX
ATX
BTX
CTX
DTX
ETX
FTX
GTX
HTX
ITX
JTX
KTX
LTX
MTX
NTX
OTX
PTX
QTX
RTX
STX
AUX
BUX
CUX
DUX
EUX
FUX
GUX
HUX
IUX
JUX
KUX
LUX
MUX
NUX
OUX
PUX
QUX
RUX
SUX
TUX
AVX
BVX
CVX
DVX
EVX
FVX
GVX
HVX
IVX
JVX
KVX
LVX
MVX
NVX
OVX
PVX
QVX
RVX
SVX
TVX
UVX
AWX
BWX
CWX
DWX
EWX
FWX
GWX
HWX
IWX
JWX
KWX
LWX
MWX
NWX
OWX
PWX
QWX
RWX
SWX
TWX
UWX
VWX
ABY
ACY
BCY
ADY
BDY
CDY
AEY
BEY
CEY
DEY
AFY
BFY
CFY
DFY
EFY
AGY
BGY
CGY
DGY
EGY
FGY
AHY
BHY
CHY
DHY
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