import textwrap

def merge_the_tools(string, k): # Break string into k-sized chunks segments = textwrap.wrap(string, k)

for segment in segments:
    unique_chars = ""
    for char in segment:
        if char not in unique_chars:
            unique_chars += char
    print(unique_chars)

if name == 'main': string, k = input(), int(input()) merge_the_tools(string, k)