#include<iostream>#include<string>#include<cstdio>using namespace std;const string weeks[]={"Monday","Tuesday","Wednesday","Thursday","Friday","Saturday","Sunday"};const string months[]={"January","February","March","April","May","June","July","August","September","October","November","December"};const int cnt[2][12]={ 31,28,31,30,31,30,31,31,30,31,30,31, 31,29,31,30,31,30,31,31,30,31,30,31};int leapyear(int y){ if(y%4==0&&y%100!=0||y%400==0) return 1; return 0;}int DayOfWeek(int M,int D,int Y){ if(M==1||M==2) { M+=12; --Y; } if(Y<1752||(Y==1752&&M<9)||(Y==1752&&M==9&&D<3)) return(D+2*M+3*(M+1)/5+Y+Y/4+5)%7; else return (D+2*M+3*(M+1)/5+Y+Y/4-Y/100+Y/400)%7;}bool Check(int m,int d,int y){ if(!(m>=1&&m<13)) return false; if(!(d>=1 && d<=cnt[leapyear(y)][m-1])) return false; if(y==1752&&m==9&&d>2&&d<14) return false; return true;}int main(void){ int m,d,y; while(cin>>m>>d>>y,m+d+y) { if(Check(m,d,y))printf("%s %d, %d is a %sn",months[m-1].c_str(),d,y,weeks[DayOfWeek(m,d,y)].c_str()); elseprintf("%d/%d/%d is an invalid date.n",m,d,y); } return 0;}
