#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
long long a[110];
int main() {
    long long n, k;
    cin >> n >> k;
    for (int i = 0; i < k; i++) {
        cin >> a[i];
        a[i]--;
    }
    bool b = false, b1 = false;
    bool b2 = false, b3 = false;
    bool b4 = false, b5 = false;
    for (int i = 0; i < k; i++) {
        if (b2 && a[i] % 5 == 0) {
            b = true;
        }
        if (b1 && a[i] % 5 == 1) {
            b5 = true;
        }
        if (a[i] % 5 == 1) {
            b1 = true;
        }
        if (a[i] % 5 == 2) {
            b2 = true;
        }
        if (a[i] % 5 == 3) {
            b3 = true;
        }
        if (b3 && a[i] % 5 == 4) {
            b4 = true;
        }
    }
    if (b || b4 || b5) {
        cout << "No" << endl;
    }
    else {
        cout << "Yes" << endl;
    }
    return 0;
}