from math import ceil

inp = int(input('1 - from file; 2 - from keyboard: '))
if inp == 1:
    with open('input.txt', 'r') as fin:
        a = fin.readline()
else:
    a = input('a = ')

out = int(input('1 - to file; 2 - to screen: '))
if out == 1:
    fout = open('output.txt', 'w')
else:
    fout = None

rows = ceil(len(a) ** 0.5)
ml = rows * 2 - 1
for i in range(rows):
    cl = i * 2 + 1
    print(' ' * ((ml - cl) // 2), a[i * i:(i + 1) ** 2], sep='')
if out == 1:
    fout.close()