Challenge - #27 - Merge The Tools!
def merge_the_tools(string, k):
# your code goes here
for i in range(0,len(string), k):
t = string[i:i+k]
u = set()
for j in t:
if j not in u:
print(j,end = '')
u.add(j)
print()
if __name__ == '__main__':
string, k = input(), int(input())
merge_the_tools(string, k)
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