
class Solution {
public String solution(int a, int b) {
String[] days = {"SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT"};
int[] months = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30};
int total = 0;
for(int i=0; i<a; i++) {
total += months[i];
}
total += b;
return days[(total + 4) % 7];
}
}