#include <stdio.h>
#include <vector>
int main() {
    bool result = false;
    long int n, k;
    scanf("%ld,%ld", &n, &k);
    std::vector<long int> a(n);
    std::vector<long int>::iterator p = a.begin();
    for (long int i = 0; i < n; i++) {
        scanf("%ld", (p + i));
    }
    if (n == 1) {
        printf("No");
    } else {
        for (long int i = 0; i < n - 1; i++) {
            for (long int j = i + 1; j < n; j++) {
                if (*(p + i) + *(p + j) == k) {
                    printf("Yes");
                    return 0;
                }
            }
        }
        printf("No")
    }
    return 0;
}

/sandbox/1/a.cpp: In function 'int main()':
/sandbox/1/a.cpp:10:19: warning: format '%ld' expects argument of type 'long int*', but argument 2 has type '__gnu_cxx::__normal_iterator<long int*, std::vector<long int> >' [-Wformat=]
             scanf("%ld", (p + i));
                   ^~~~~  ~~~~~~~
/sandbox/1/a.cpp:23:21: error: expected ';' before '}' token
         printf("No")
                     ^
                     ;
     }
     ~                
/sandbox/1/a.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%ld,%ld", &n, &k);
     ~~~~~^~~~~~~~~~~~~~~~~~~
/sandbox/1/a.cpp:10:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%ld", (p + i));
             ~~~~~^~~~~~~~~~~~~~~~