def merge_the_tools(string, k):
    import textwrap
    string = textwrap.wrap(string, k)
    for i in string:
        new_string = ""
        for a,b in enumerate(i):
            if b not in new_string:
                new_string += b
        print(new_string)

if __name__ == '__main__':
    string, k = input(), int(input())
    merge_the_tools(string, k)