**itertools.permutations() python**

### Problem Statement :

itertools.permutations(iterable[, r]) This tool returns successive r length permutations of elements in an iterable. If r is not specified or is None, then r defaults to the length of the iterable, and all possible full length permutations are generated. Permutations are printed in a lexicographic sorted order. So, if the input iterable is sorted, the permutation tuples will be produced in a sorted order. Sample Code >>> from itertools import permutations >>> print permutations(['1','2','3']) <itertools.permutations object at 0x02A45210> >>> >>> print list(permutations(['1','2','3'])) [('1', '2', '3'), ('1', '3', '2'), ('2', '1', '3'), ('2', '3', '1'), ('3', '1', '2'), ('3', '2', '1')] >>> >>> print list(permutations(['1','2','3'],2)) [('1', '2'), ('1', '3'), ('2', '1'), ('2', '3'), ('3', '1'), ('3', '2')] >>> >>> print list(permutations('abc',3)) [('a', 'b', 'c'), ('a', 'c', 'b'), ('b', 'a', 'c'), ('b', 'c', 'a'), ('c', 'a', 'b'), ('c', 'b', 'a')] Task You are given a string S. Your task is to print all possible permutations of size k of the string in lexicographic sorted order. Input Format A single line containing the space separated string S and the integer value k. Constraints 0<k<=len(S) The string contains only UPPERCASE characters. Output Format Print the permutations of the string S on separate lines.

### Solution :

` ````
Solution in C :
from itertools import permutations
s,n=input().split()
n=int(n)
vals=list(permutations(s,n))
res=[]
for x in vals:
res.append(''.join(x))
print('\n'.join(sorted(res)))
```

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