fork download
  1. n=input()
  2. r=range(n)
  3. for i in r:print'a%*s'%(n,''.join(chr(97+j)for j in r)[:i+1])
Success #stdin #stdout 0.01s 7900KB
stdin
26
stdout
a                         a
a                        ab
a                       abc
a                      abcd
a                     abcde
a                    abcdef
a                   abcdefg
a                  abcdefgh
a                 abcdefghi
a                abcdefghij
a               abcdefghijk
a              abcdefghijkl
a             abcdefghijklm
a            abcdefghijklmn
a           abcdefghijklmno
a          abcdefghijklmnop
a         abcdefghijklmnopq
a        abcdefghijklmnopqr
a       abcdefghijklmnopqrs
a      abcdefghijklmnopqrst
a     abcdefghijklmnopqrstu
a    abcdefghijklmnopqrstuv
a   abcdefghijklmnopqrstuvw
a  abcdefghijklmnopqrstuvwx
a abcdefghijklmnopqrstuvwxy
aabcdefghijklmnopqrstuvwxyz