'use strict'
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"));