fn main() {
    var u64: a
    var u64: b
    var u64: c

    1 while dup 1000 < do {
        dup a !
        1 while dup a @ + 1000 < do {
            dup b !
            1000 a @ - b @ - c !

            a @ dup * b @ dup * + c @ dup * == if {
                a @ b @ * c @ * println
                drop drop return
            }

            1 +
        } drop
        1 +
    } drop
}