n= int(input())
if n==1:
	print("a")
if n==2:
	print("ab"),print("ba")
if n==3:
	print("abc"),print("bab"),print("cba")
if n==4:
	print("abcd"),print("babc"),print("cbab"),print("dcba")	
if n==5:
	print("abcde"),print("babcd"),print("cbabc"),print("dcbab"),print("edcba")
if n==6:
	print("abcdef"),print("babcde"),print("cbabcd"),print("dcbabc"),print("edcbab"),print("fedcba")
if n==7:
	print("abcdefg"),print("babcdef"),print("cbabcde"),print("dcbabcd"),print("edcbabc"),print("fedcbab"),print("gfedcba")
if n==8:
	print("abcdefgh"),print("babcdefg"),print("cbabcdef"),print("dcbabcde"),print("edcbabcd"),print("fedcbabc"),print("gfedcbab"),print("hgfedcba")	
if n==9:
	print("abcdefghi"),print("babcdefgh"),print("cbabcdefg"),print("dcbabcdef"),print("edcbabcde"),print("fedcbabcd"),print("gfedcbabc"),print("hgfedcbab"),print("ihgfedcba")
if n==10:
	print("abcdefghij"),print("babcdefghi"),print("cbabcdefgh"),print("dcbabcdefg"),print("edcbabcdef"),print("fedcbabcde"),print("gfedcbabcd"),print("hgfedcbabc"),print("ihgfedcbab"),print("jihgfedcba")
if n==11:
	print("abcdefghijk"),print("babcdefghij"),print("cbabcdefghi"),print("dcbabcdefgh"),print("edcbabcdefg"),print("fedcbabcdef"),print("gfedcbabcde"),print("hgfedcbabcd"),print("ihgfedcbabc"),print("jihgfedcbab")
	print("kjihgfedcab")
if n==12:
	print("abcdefghijkl"),print("babcdefghijk"),print("cbabcdefghij"),print("dcbabcdefghi"),print("edcbabcdefgh"),print("fedcbabcdefg"),print("gfedcbabcdef"),print("hgfedcbabcde"),print("ihgfedcbabcd"),print("jihgfedcbabc")
	print("kjihgfedcbab"),print("lkjihgfedcba")
if n==13:
	print("abcdefghijklm"),print("babcdefghijkl"),print("cbabcdefghijk"),print("dcbabcdefghij"),print("edcbabcdefghi"),print("fedcbabcdefgh"),print("gfedcbabcdefg"),print("hgfedcbabcdef"),print("ihgfedcbabcde")
	print("jihgfedcbabcd"),print("kjihgfedcbabc"),print("lkjihgfedcbab"),print("mlkjihgfedcba")
if n==14:
	print("abcdefghijklmn"),print("babcdefghijklm"),print("cbabcdefghijkl"),print("dcbabcdefghijk"),print("edcbabcdefghij"),print("fedcbabcdefghi"),print("gfedcbabcdefgh"),print("hgfedcbabcdefg"),print("ihgfedcbabcdef")
	print("jihgfedcbabcde"),print("kjihgfedcbabcd"),print("lkjihgfedcbabc"),print("mlkjihgfedcbab"),print("nmlkjihgfedcba")
if n==15:
	print("abcdefghijklmno"),print("babcdefghijklmn"),print("cbabcdefghijklm"),print("dcbabcdefghijkl"),print("edcbabcdefghijk"),print("fedcbabcdefghij"),print("gfedcbabcdefghi"),print("hgfedcbabcdefgh")
	print("ihgfedcbabcdefg"),print("jihgfedcbabcdef"),print("kjihgfedcbabcde"),print("lkjihgfedcbabcd"),print("mlkjihgfedcbabc"),print("nmlkjihgfedcbab"),print("onmlkjihgfedcba")	

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MTU=

15