main();
halt;

function main() {
    nat x = 20;

    if (x == 10) {
        print("x is 10");
    } else if (x == 20) {
        print("x is 20");
    } else {
        print("x is something else");
    }
}

function print(str string) {
    nat i = 0;
    while (i < string.length) {
        write = string[i];
        i = i + 1;
    }
    write = '\n';
}