04. Car Number

package main

import "fmt"

func main() {
    var startNum, finalNum int
    fmt.Scanln(&startNum)
    fmt.Scanln(&finalNum)

    for i := startNum; i <= finalNum; i++ {
        for k := startNum; k <= finalNum; k++ {
            for j := startNum; j <= finalNum; j++ {
                for x := startNum; x <= finalNum; x++ {
                    if (i % 2 == 0 && x % 2 == 1 || i % 2 == 1 && x % 2 == 0) && i > x && (k + j) % 2 == 0 {
                        fmt.Printf("%d%d%d%d ", i, k, j, x)
                    }
                }
            }
        }
    }
}