package main

import (
	"fmt"
	"strings"
)

func main() {
	var f, s string
	d := 31
	fmt.Scan(&f, &s)
	if strings.HasPrefix(f, "S") {
		d++
		if strings.HasPrefix(s, "S") {
			d++
		}
	}
	fmt.Printf("8/%d\n", d)
}