func main() {
    var x
    while (1) {
        var y = x
        while (1) {
            println(y, " <= ", x)
            y = y - 1
            if (y < 0)
                break
        }

        println("====")

        x = x + 1
        if (x == 5)
            break
    }
}

//TESTCASE:
//0 <= 0
//====
//1 <= 1
//0 <= 1
//====
//2 <= 2
//1 <= 2
//0 <= 2
//====
//3 <= 3
//2 <= 3
//1 <= 3
//0 <= 3
//====
//4 <= 4
//3 <= 4
//2 <= 4
//1 <= 4
//0 <= 4
//====