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from itertools import combinations
s,k=input().split()
k1=int(k)
s1=list(s)
s1.sort()
for i in range(0,k1):
p=list(combinations(s1,i+1))
for i in p:
j="".join(i)
print(j)
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itertools.combinations()
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from itertools import combinations s,k=input().split() k1=int(k) s1=list(s) s1.sort() for i in range(0,k1): p=list(combinations(s1,i+1)) for i in p: j="".join(i) print(j)