#! /usr/bin/env python
# -*-encoding utf-8-*-


year_input = input("Geben Sie das Jahr ein! (4-Ziffer) ")

year = int(year_input)
k = year // 100
m = 15 + ((3*k + 3)//4) - ((8*k + 13)//25)
s = 2 - (3*k + 3) // 4
a = year % 19
d = (19*a + m) % 30
r = (d + a//11) // 29
og = 21 + d - r
sz = 7 - (year + (year//4) + s) % 7
oe = 7 - ((og - sz) % 7)
os = og + oe

if os <= 31:
    print(f"Der Ostersonntag ist {os}.ter März")
else:
    os = os % 31
    print(f"Der Ostersonntag is {os}.ter April")