package main import "fmt" func main() { var n, m int list := []bool{false, false, false, false} fmt.Scan(&n) fmt.Scan(&m) list[n] = true var p, q int for i := 0; i < m; i++ { fmt.Scan(&p, &q) list[p], list[q] = list[q], list[p] } for i := 1; i <= 3; i++ { if list[i] { fmt.Println(i) } } }