#!/bin/python

import sys
from math import floor, ceil

sentence = raw_input().replace(" ", "")
size = len(sentence)
root = size ** .5

row = int(floor(root))
column = int(ceil(root))

while row * column < size:
    if row < column:
        row += 1
    else:
        column += 1

sentence += (((row * column) - len(sentence)) * " ")

matrix = []

for i in xrange(row):
    matrix.append(sentence[i * column:column * (i + 1)])

for i in xrange(column):
    word = ""
    for j in xrange(row):
        word += matrix[j][i]
    sys.stdout.write(word.strip() + " ")