package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	var g, c, l int
	if _, err := fmt.Fscan(in, &g, &c, &l); err != nil {
		return
	}

	min := g
	if c < min {
		min = c
	}
	if l < min {
		min = l
	}

	max := g
	if c > max {
		max = c
	}
	if l > max {
		max = l
	}

	if max-min >= 10 {
		fmt.Fprintln(out, "check again")
	} else {
		median := g + c + l - min - max
		fmt.Fprintf(out, "final %d\n", median)
	}
}