#include <iostream>
#include <sys/mman.h>
#include <unistd.h>

#define rd_skip() while(*rp++ >= 48)
#define rd() ({long _v = 0, _c; while((_c = *rp++ - 48) >= 0) _v = _v * 10 + _c; _v;})

int main() {
    char *rp = static_cast<char*>(mmap(nullptr, 1 << 25, PROT_READ, MAP_PRIVATE, 0, 0));
    rd_skip();
    long x = 0;
    while(*rp) {
        rd_skip();
        if(*rp) {
            x ^= rd();
        }
    }
    write(1, x ? "Alice" : "Bob  ", 5);
    _exit(0);
}