#!/bin/python
import sys
y = int(raw_input().strip())
# your code goes here
months = {0:31,1:28,2:31,3:30,4:31,5:30,6:31,7:31,8:30,9:31,10:30,11:31}
if y <= 1917:
    tot = 0
    for i in range(12):
        if tot + months[i] > 256:
            break
        if y % 4 == 0 and i == 1:
            tot = tot + 29
        else:
            tot = tot + months[i]
    ans = ""
    day = 256 - tot
    month = i + 1
    ans = ans + str(day) + ".0" + str(month) + "." + str(y)
    print ans
elif y == 1918:
    tot = 0
    for i in range(12):
        if tot + months[i] > 256:
            break
        if i == 1:
            tot = tot + 15
        else:
            tot = tot + months[i]
    ans = ""
    day = 256 - tot
    month = i + 1
    ans = ans + str(day) + ".0" + str(month) + "." + str(y)
    print ans
else:
    tot = 0
    for i in range(12):
        if tot + months[i] > 256:
            break
        if (y % 400 == 0 or (y % 4 == 0 and y % 100 != 0)) and i == 1:
            tot = tot + 29
        else:
            tot = tot + months[i]
    ans = ""
    day = 256 - tot
    month = i + 1
    ans = ans + str(day) + ".0" + str(month) + "." + str(y)
    print ans