// inputに入力データ全体が入る
function Main(input) {
	if(input == 'SUN'){
      console.log(7);
    }else if(input == 'MON'){
      console.log(6);
    }else if(input == 'TUE'){
      console.log(5);
    }else if(input == 'WED'){
      console.log(4);
    }else if(input == 'THU'){
      console.log(3);
    }else if(input == 'FRI'){
      console.log(2);
    }else if(input == 'SAT'){
      console.log(1);
    }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));