#!/usr/bin/env python3

import sys

DEFAULT_N_SPACES = 4
TAB, SPACE = '	', ' '

try:
    n_spaces = int(sys.argv[1])
except:
    n_spaces = DEFAULT_N_SPACES

if n_spaces < 1:
    n_spaces = DEFAULT_N_SPACES

for line in sys.stdin:
    line = line.rstrip()
    n_leading_spaces = 0

    for ch in line:
        if ch != SPACE:
            break
        n_leading_spaces += 1

    if 0 < n_leading_spaces < n_spaces:
        n_tabs = 1
    else:
        n_tabs = n_leading_spaces // n_spaces

    print(TAB * n_tabs, line[n_leading_spaces:], sep='')