function Main(input) {
  var list = {
    'SUN': 7,
    'MON': 6,
    'TUE': 5,
    'WED': 4,
    'THU': 3,
    'FRI': 2,
    'SAT': 1,
  }
  console.log(list[input])
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));