package main
import (
    "bufio"
    "fmt"
    "os"
)

var sc = bufio.NewScanner(os.Stdin)

func nextLine() string {
    sc.Scan()
    return sc.Text()
}

func main() {
    for i := 0; i < 32; i++ {
    	s := nextLine()
	if s[1] == s[2] {
	    fmt.Print(s[2]-'0')
	} else {
	    fmt.Print(s[4]-'0')
	}
    }
}