import sys
import random
 
users = sys.stdin.readline().split(', ')
print random.choice(users)

aW1wb3J0IHN5cwppbXBvcnQgcmFuZG9tCgp1c2VycyA9IHN5cy5zdGRpbi5yZWFkbGluZSgpLnNwbGl0KCcsICcpCnByaW50IHJhbmRvbS5jaG9pY2UodXNlcnMp

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

2green, a_new_error, AceTM, AdiBdg, agsonklakson, akwajuk21, aleeceja, AlphaOmega, andrzej204, aniaczy, Anteras, arkagham, aro84, arrent, asema, aswalt, AveNergal, Awerege, BenkartGorszegoBoga, BiBiTheCat, Bladi89, blntgr, Bm_th, Boomkin, Brodal, carving85, catkarol, cheft, Chemical_Usagi, ciubix, coffeinaddict, coolcooly22, cpoonbezklamky, crystalmephedron, CzarnyFlamaster, cziterus, czmaja, DaintyBiberveldt, damian1123, danielet, Darktek, darthbob, ddkcz, diabejohn, dombiee, DonMatheo, Drax2901, dwadaszki, Dziewczynainformatyka, dziki17, dziubeQ, elodagus, energy19, exzxxx, fellinhen, felur, Finezyjny_login, gadatos, Galmi, gdziemojeciastka, Golomp, grabek033, GrabkaMan, grosheck, grzejnik_pokojowy, Gumiack, haaaeee, hamskloss, Howkin, HrabiaTruposz, jachous, jak_to_mozliwe, Jamnik_Chrupek, jarulek, jascen, Jezus_z_Galileii, jnk21, jombl, justlikethat, Kamson_San, KAROO, karpatka_, kaskaderMike, katera, kawaiimaid666, keisut, kochaj_albo_rzuc, Koller, komitet_figli, Konard, Kressska, kuba_3231, laffitte, Legendowsky, Lichu, lilimonco, Lorax, loveGFD, magenciorek, Makku11, MAMAra, marcinlewy, MasterSoundBlaster, matwolny, MaxMar, maxtrosoft, McCzarny, Mefyou, meh0wski, meretz, mikaliq, Mikster, mirkobiniu, mitau, Mokosza, MrSernicham, n__s, nama, Nicy, niekulturalnyszabrownik, NieNieNieNieSwissAccounts, norbi111, Obsavian, oreze, ovtza, p98, pamietamfanzonuna, PanKtos, pershing, Petko, Pijokot, Pikieros, Piter93, Poranny_dragal, PrawieJakBordo, Prezes_Lato, Prywaciarz, pysxdka, pzqmoxwn, qjot, rafiak, Rahan90, Rain_, Regis89, robson1, roszek, rrrrraz, Ruby302, RudyLis, Rzeeznik13, Rzuku, sajko, Sanski, Seskil, Shahvee, Shirako, Shivaa, slodkijezu, Smagok, smok01, Snibu, snoopster, Sojuze, sortris, staryhippis93, StarySkuter, stsgol, SuchyRAWR, Swiecorek, szare2, TeEf, Tekedo, tekon, ThrashMetal, tofik949, Tolek19, TosTos, tymol14, Ukukuki, ulkaaa, vagner, Vencite, verho, vieniasn, Viking, Viscoplaster, voorhees, Wagi, wielkilen, wirogez, wizzle, Wojcix, WuDwaKa, xann, Xardasim, Xax92, xylorinn, Zashi, Zatwardzenie, Znasz_tego_Andrzeja, Zsim, Zashi, Galmi, keisut, coffeinaddict, felur, Vencite, AveNergal, cziterus, Maxxtom, Rahan90, Znasz_tego_Andrzeja, tekon, Rain_, Xax92, oreze, dziubeQ, Wyrewolwerowany_Rewolwer, lilimonco, Golomp, Ruby302, Howkin, Zsim, Brodal, karpatka_, Nicy, qjot, asema, Boomkin, ArniHell, AdiBdg, darthbob, sortris, agsonklakson, andrzej204, Shirako, komitet_figli, Makku11, meh0wski, Paputka, DonMatheo, Pijokot, Mokosza, pysxdka, Zatwardzenie, Kpiker, pamietamfanzonuna, Mefyou, Viking