import std.algorithm;
import std.array;
import std.ascii;
import std.bigint;
import std.complex;
import std.container;
import std.conv;
import std.functional;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

auto readInts() {
	return array(map!(to!int)(readln().strip().split()));
}
auto readInt() {
	return readInts()[0];
}
auto readLongs() {
	return array(map!(to!long)(readln().strip().split()));
}
auto readLong() {
	return readLongs()[0];
}

void readlnTo(T...)(ref T t) {
    auto s = readln().split();
    assert(s.length == t.length);
    foreach(ref ti; t) {
        ti = s[0].to!(typeof(ti));
        s = s[1..$];
    }
}

class UnionFindTree {
public:
    this(size_t n) {
        parent = iota(n).array();
        rank = new size_t[](n);
    }
    size_t find(size_t n) {
        if(n == parent[n]) {
            return n;
        } else {
            parent[n] = find(parent[n]);
            return parent[n];
        }
    }
    void unite(size_t n, size_t m) {
        auto p1 = find(n);
        auto p2 = find(m);
        if(n == m) {
            return;
        }
        if(rank[p1] < rank[p2]) {
            swap(p1, p2);
        }
        if(rank[p1] == rank[p2]) {
            ++rank[p1];
        }
        parent[p2] = p1;
    }
private:
    size_t[] parent;
    size_t[] rank;
}
unittest {
    auto uft = new UnionFindTree(10);
    foreach(i; iota(10)) {
        assert(uft.find(i) == i);
    }
    foreach(i; iota(10).filter!(a => a%3 == 0).drop(1)) {
        uft.unite(i, i-3);
    }
    foreach(i; iota(10).filter!(a => a%3 == 0)) {
        assert(uft.find(0) == uft.find(i));
    }
    foreach(i; iota(10).filter!(a => a%3 != 0)) {
        assert(uft.find(0) != uft.find(i));
    }
}

//内部では1-based, 使うときは0-based
class BinaryIndexedTree(T, alias F = "a + b") if(is(typeof(binaryFun!F))) {
    alias f = binaryFun!F;
public:
    this(in size_t n, in T T0 = T.init) {
        t.length = n+1;
        t[] = T0;
    }

    void add(in size_t idx, in T v)
    in {
        assert(idx < t.length-1);
    }
    body {
        one_based_add(idx+1, v);
    }

    T accumulate(size_t idx) {
        return one_based_accumulate(idx+1);
    }

private:
    T[] t;

    //1-based
    void one_based_add(size_t idx, in ref T v) {
        if(idx >= t.length) {
            return;
        }
        t[idx] = f(t[idx], v);
        one_based_add(idx + (idx & (-idx)), v);
    }
    T one_based_accumulate(size_t idx) {
        if(idx == 0) {
            return t[0];
        } else {
            return f(one_based_accumulate(idx - (idx & (-idx))), t[idx]);
        }
    }
}
unittest {
    auto bit = new BinaryIndexedTree!(long)(10);
    foreach(i; iota(10)) {
        assert(bit.accumulate(i) == 0);
    }
    bit.add(5, 3);
    foreach(i; iota(5)) {
        assert(bit.accumulate(i) == 0);
    }
    foreach(i; iota(5, 10)) {
        assert(bit.accumulate(i) == 3);
    }

    bit.add(7, 2);

    foreach(i; iota(5)) {
        assert(bit.accumulate(i) == 0);
    }
    foreach(i; iota(5, 7)) {
        assert(bit.accumulate(i) == 3);
    }
    foreach(i; iota(7, 10)) {
        assert(bit.accumulate(i) == 5);
    }
}
unittest {
    auto bit = new BinaryIndexedTree!(long, "a*b")(10, 1);
    foreach(i; iota(10)) {
        assert(bit.accumulate(i) == 1);
    }
    bit.add(5, 3);
    foreach(i; iota(5)) {
        assert(bit.accumulate(i) == 1);
    }
    foreach(i; iota(5, 10)) {
        assert(bit.accumulate(i) == 3);
    }

    bit.add(7, 2);

    foreach(i; iota(5)) {
        assert(bit.accumulate(i) == 1);
    }
    foreach(i; iota(5, 7)) {
        assert(bit.accumulate(i) == 3);
    }
    foreach(i; iota(7, 10)) {
        assert(bit.accumulate(i) == 6);
    }
}


const real eps = 1e-10;

const long p = 1_000_000_000 + 7;

class Node {
public:
    Node one;
    Node zero;

    void add(string s) {
        if(s.empty()) {
            return;
        }
        if(s[0] == '0') {
            if(zero is null){ 
                zero = new Node();
            }
            zero.add(s[1..$]);
        } else {
            if(one is null) {
                one = new Node();
            }
            one.add(s[1..$]);
        }
    }
    void dfs(ref long[] x, long l) {
        if((one is null) ^ (zero is null)) {
            x ~= l;
        }
        if(one !is null) {
            one.dfs(x, l-1);
        }
        if(zero !is null) {
            zero.dfs(x, l-1);
        }
    }
}

void main(){
    long n, l;
    readlnTo(n, l);
    auto root = new Node();
    foreach(i; iota(n)) {
        auto s = readln().chomp();
        root.add(s);
    }
    long[] t;
    root.dfs(t, l);
    writeln(reduce!"a ^ b"(0L, t.map!(x => x & (-x))) ? "Alice": "Bob");
}



Measured memory_bytes: 13180