#!/usr/local/bin/python

import sys

DIGITS = '0123456789abcdefghijklmnopqrstuvwxyz'

def base36encode(n):
    s = ''
    while True:
        n, r = divmod(n, len(DIGITS))
        s = DIGITS[r] + s
        if n == 0:
            break
    return s

def base36decode(s):
    n, s = 0, s[::-1]
    for i in xrange(0, len(s)):
        r = DIGITS.index(s[i])
        n += r * (len(DIGITS) ** i)
    return n


input_var = long(sys.argv[1], 16)

output = base36encode(input_var)
print  '%s' % output