import java.util.Scanner

object Main {
  def main(args: Array[String]) {
    val result = solve(new Scanner(System.in))
    if (result.length > 0) println(result)
  }

  def solve(in: String): String = solve(new Scanner(in))

  def solve(sc: Scanner): String = {
    val S = sc.next

    val weeks = Array("SUN", "MON", "TUE", "WED", "THU", "FRI", "SAT")

    for (i <- weeks.indices) {
      if (S == weeks(i)) {
        return (7 - i).toString
      }
    }
    ""
  }
}
