Go: package main

import "fmt"

func main() {
	days := [12]int{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
	weekday := [7]string{"Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday"}

	for {
		var m, d int
		fmt.Scan(&m, &d)
		if m == 0 {
			break
		}

		for i := 0; i < m-1; i++ {
			d += days[i]
		}

		fmt.Println(weekday[d%7])
	}
}

C++: #include<iostream>
#include<string>
#include<algorithm>
#include<map>
#include<set>
#include<utility>
#include<vector>
#include<cmath>
#include<cstdio>
#define loop(i,a,b) for(int i=a;i<b;i++) 
#define rep(i,a) loop(i,0,a)
#define pb push_back
#define mp make_pair
#define it ::iterator
#define all(in) in.begin(),in.end()
const double PI=acos(-1);
const double ESP=1e-10;
using namespace std;
int main(){
  int m,d;
  while(cin>>m>>d,m+d){
    int day = 0;
    m--;
    // 2 , 4 , 6 , 9 . 11 
    int month[12] = {31,29,31,30,31,30,
		     31,31,30,31,30,31};
    rep(i,m){
      day+=month[i];
    }
    day=(day + d + 7 - 1)%7;
    switch(day){
    case 0:
      cout<<"Thursday"<<endl;
      break;
    case 1:
      cout<<"Friday"<<endl;
      break;
    case 2:
      cout<<"Saturday"<<endl;
      break;
    case 3:
      cout<<"Sunday"<<endl;
      break;
    case 4:
      cout<<"Monday"<<endl;
      break;
    case 5:
      cout<<"Tuesday"<<endl;
      break;
    case 6:
      cout<<"Wednesday"<<endl;
      break;
    }
    

  }
}

C++: //#define _USE_MATH_DEFINES
//#include <cmath>
#include <iostream>
//#include <stdio.h>
//#include <stdlib.h>
//#include <iomanip>
//#include <vector>
#include <string>
//#include <algorithm>
//#include <functional>
#include <time.h>
//#include <sstream>
//#include <queue>

using namespace std;


int main(){

	int m, d;
	int days[13] = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
	int sum = 0;
	string wd[7] = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };


	while (cin >> m >> d){
		if (m == 0)break;

		sum = days[m - 1] + d;

		cout << wd[(sum+2) % 7] << endl;

	}


	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(){
  for (;;) {
    int m, d;
    cin >> m >> d;
    if (m == 0) break;

    vector<int> day = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
    int tmp = d;
    for (int i = 0; i < m - 1; i++) {
      tmp += day.at(i);
    }

    int ans = tmp % 7;
    vector<string> week = {"Wednesday", "Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday"};
    cout << week.at(ans) << endl;
  }
}

C++: #include<cstdio>

int main(){
	int a[] = {0,0,31,60,91,121,152,182,213,244,274,305,335,366};
	int m, d;
	char day[7][10] = {"Monday", "Tuesday", "Wednesday", "Thursday","Friday","Saturday","Sunday"};
	scanf("%d %d", &m, &d
	while(m || d){
		printf("%s\n", day[(a[m] + d + 2) % 7]);
		scanf("%d %d", &m, &d
	}
}

C++: #include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <stack>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cctype>
#include <cmath>
#include <cassert>

using namespace std;


#define all(c) ((c).begin()), ((c).end())
#define debug(c) cerr << "> " << #c << " = " << (c) << endl;
#define iter(c) __typeof((c).begin())
#define present(c, e) ((c).find((e)) != (c).end())
#define cpresent(c, e) (find(all(c), (e)) != (c).end())
#define tr(i, c) for (iter(c) i = (c).begin(); i != (c).end(); i++)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define REP(i, a, b) for (int i = (int)(a); i <= (int)(b); i++)

#define mp make_pair
#define fst first
#define snd second
#define pb push_back


const double EPS = 1e-10;


typedef long long ll;
typedef vector<int> vi;
typedef pair<int, int> pii;
typedef complex<double> P;


int days(int y,int m, int d) {
	if (m < 3) {
		y--;
		m += 12;
	}
	return 365 * y + y / 4 - y / 100 + y / 400 + (13 * m + 8) / 5 + d;
}

int main(){
	for (int m, d; cin >> m >> d, (m | d) != 0; ) {
		int a = days(2004, m, d) % 7;
		string t[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
		cout << t[a] << endl;
	}
	
	return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main(void)
{
	int m, d;
	string s[] = {"Thursday", "Friday", "Saturday", "Sunday", "Monday", "Tuesday", "Wednesday"};
	int mt[] = {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

	while(cin >> m >> d){
		if(m == 0 && d == 0)
			break;

		int r;
		m--;
		int day = d;
		for(int i = 0; i < m; i++)
			day += mt[i];
		cout << s[(day - 1) % 7] << endl;
	}

	return 0;
}

C++: #define _USE_MATH_DEFINES
#include <iostream>
#include <sstream>
#include <cmath>
#include <algorithm>
#include <queue>
#include <stack>
#include <limits>

typedef long long ll;
using namespace std;

int main()
{
	int days[] = {31,29,31,30,31,30,31,31,30,31,30,31};
	string week[] = {"Thursday","Friday","Saturday","Sunday","Monday","Tuesday","Wednesday"};

	int a,b;
	while(~scanf("%d %d",&a,&b)){
		if(a==0 && b==0) break;

		int passed=0;
		for(int i=0;i<a - 1;i++){
			passed += days[i];
		}

		passed += b;
		cout << week[(passed - 1) % 7] << endl;
	}
}

C++: #include <iostream>
#include <iomanip>
#include <vector>
#include <string>
#include <stack>
#include <queue>
#include <deque>
#include <set>
#include <map>
#include <algorithm>
#include <sstream>
#include <cstdlib>
#include <cstring>
#include <functional>
#include <numeric>
#include <cmath>
#include <climits>
#include <limits>
#include <cfloat>
#include <fstream>
using namespace std;

int main()
{
//	cut here before submit 
	freopen("testcase.wdt", "r", stdin);
	// 2004/01/01 is Thursday
	const string week[] = {
	"Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday", "Sunday" };
	const int days[] = { 0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 }; 
	string str = "";
	
	while (1){
		int month, day;		
		cin >> month >> day;
		if (month == 0 && day == 0){
			break;
		} // end if
		int num = 0;
		int i;
		for (i = 0; i < month; ++i){
			num += days[i];
		} // end for
		num += day;
		cout << week [( num - 1 + 3 ) % 7 ] << endl;
	} // end while
		
	return 0;
}

C++: #include<iostream>
using namespace std;
int main(){
  int n,m;
  int x[12] = {0,3,4,0,2,5,0,3,6,1,4,0};
  while(cin >>n>>m,n||m){
    if((m+x[n-1])%7 == 1) cout <<"Thursday"<<endl;
    if((m+x[n-1])%7 == 2) cout <<"Friday"<<endl;
    if((m+x[n-1])%7 == 3) cout <<"Saturday"<<endl;
    if((m+x[n-1])%7 == 4) cout <<"Sunday"<<endl;
    if((m+x[n-1])%7 == 5) cout <<"Monday"<<endl;
    if((m+x[n-1])%7 == 6) cout <<"Tuesday"<<endl;
    if((m+x[n-1])%7 == 0) cout <<"Wednesday"<<endl;
  }
  return 0;
}

C++: #include <iostream>
using namespace std;

int manth[] = {31,29,31,30,31,31,30,31,31,30,31,30,31};
string date[] = {"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};

int main(){
	int M, D;
	while( cin >> M >> D, M ){
		int d = 3;
		for(int i=0; i<M-1; i++ ){
			d += manth[i];
		}
		d += D;
		d %= 7;
		cout << date[d] << endl;
	}
}

C++: #include<bits/stdc++.h>
using namespace std;

int month[13]={0,31,29,31,30,31,30,31,31,30,31,30,31};

int main(){
    int m,d;

    while(cin>>m>>d,m||d){
        for(int i=1;i<m;i++)d+=month[i];
        d=(d-1)%7+3;
        string ans;
        switch(d){
        case 0:ans="Monday";break;
        case 1:ans="Tuesday";break;
        case 2:ans="Wednesday";break;
        case 3:ans="Thursday";break;
        case 4:ans="Friday";break;
        case 5:ans="Saturday";break;
        case 6:ans="Sunday";break;
        }

        cout<<ans<<endl;
    }
}