import textwrap

def wrap(string, max_width):
  
  count = 0
  new_string = ""
  
  for char in string:
    count+=1
     
    if count!=0 and count%max_width == 0:
      new_string += char + "\n"
    else:
      new_string+= char
  return new_string

if __name__ == '__main__':
    string, max_width = input(), int(input())
    result = wrap(string, max_width)
    print(result)