#include <iostream>

#include <string>

int dayOfWeek(int y, int m, int d){

int t[]={0, 3, 2, 5, 0, 3, 5, 1, 4, 6, 2, 4};

y -= (m<3) ? 1 : 0;

return (y + y/4 - y/100 + y/400 + t[m-1] + d) % 7;

}

int main(int argc, char** argv){

if(argc != 4){

std::cout<<"usage is: program YYYY MM DD"<<std::endl;

return -1;

}

int year=std::stoi(argv[1]);

int month=std::stoi(argv[2]);

int day=std::stoi(argv[3]);

std::string days[7]={"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

std::cout<<days[dayOfWeek(year, month, day)]<<std::endl;

return 0;

}