int main() {
    int a;
    int b;
    int c;
    int i;
    a = 1;
    b = 2;
    i = 0;
    while (i < 9) {
        putint(a);
        c = a;
        a = b;
        b = c;
        i = i + 1;
    }
    return a;
}