hdu 4084

#include <cstdio>
#include <cstring>
#include <algorithm>

using namespace std;
typedef long long ll;
const int N = 105;
const int MOD = 1e9+7;

int n, m, c, d;
ll dp[2][25][(1<<11)+5];
char g[N][N];

int solve () {
    int now = 0, pre = 1;
    int e = (1<<m)-1;

    memset(dp[now], 0, sizeof(dp[now]));
    dp[now][0][e] = 1;

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {

            swap(now, pre);
            memset(dp[now], 0, sizeof(dp[now]));

            for (int k = 0; k <= d; k++) {
                for (int s = 0; s <= e; s++) {
                    if (g[i][j] == '1') {
                        if (s & (1<<j))
                            dp[now][k+1][s] = (dp[now][k+1][s] + dp[pre][k][s])%MOD;

                        if (j && !(s&(1<<(j-1))) && (s&(1<<j)))
                            dp[now][k][s|(1<<(j-1))] = (dp[now][k][s|(1<<(j-1))] + dp[pre][k][s])%MOD;

                        dp[now][k][s^(1<<j)] = (dp[now][k][s^(1<<j)] + dp[pre][k][s])%MOD;
                    } else {
                        if (s & (1<<j))
                            dp[now][k][s] = (dp[now][k][s] + dp[pre][k][s])%MOD;
                    }
                }
            }
        }
    }
    int ans = 0;
    for (int i = c; i <= d; i++)
        ans = (ans + dp[now][i][e])%MOD;
    return ans;
}

int main () {
    while (scanf("%d%d%d%d", &n, &m, &c, &d) == 4) {
        for (int i = 0; i < n; i++)
            scanf("%s", g[i]);
        printf("%d\n", solve());
    }
    return 0;
}