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from itertools import combinations
S,k=input().split()
S="".join(sorted(S))
k=int(k)
for i in range(1,k+1):
li=list(combinations(S,i))
li=["".join(i) for i in li]
print(*li,sep="\n")
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itertools.combinations()
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from itertools import combinations S,k=input().split() S="".join(sorted(S)) k=int(k) for i in range(1,k+1): li=list(combinations(S,i)) li=["".join(i) for i in li] print(*li,sep="\n")