#include <fstream>
#define DIM 1002

using namespace std;

ifstream in ("matrix.in");
ofstream out("matrix.out");

int matHumanDim, matVirusDim, virusApparitions[200], virusCurrentApparitions[200], letterUp[DIM][DIM], ans;

char letter, matHuman[DIM][DIM];

int main(int argc, const char * argv[]) {
    in>>matHumanDim>>matVirusDim;
    for(int cntLin = 1; cntLin <= matHumanDim; ++ cntLin)
        for(int cntCol = 1; cntCol <= matHumanDim; ++ cntCol)
            in>>matHuman[cntLin][cntCol];
    
    for(int cntLin = 1; cntLin <= matVirusDim; ++ cntLin){
        for(int cntCol = 1; cntCol <= matVirusDim; ++ cntCol){
            in>>letter;
            ++ virusApparitions[letter];
        }
    }
    
    for(int cntLin = 1; cntLin <= matHumanDim; ++ cntLin){
        for(int cnt = 'a'; cnt <= 'z'; ++ cnt){
            virusCurrentApparitions[cnt] = 0;
        }
        for(int cntCol = 1; cntCol <= matHumanDim; ++ cntCol){
            //++ virusCurrentApparitions[matHuman[cntLin][cntCol]];
            ++ letterUp[cntCol][matHuman[cntLin][cntCol]];
            if(cntLin - matVirusDim >= 0){
                if(cntLin - matVirusDim >= 1){
                    -- letterUp[cntCol][matHuman[cntLin - matVirusDim][cntCol]];
                    //-- matHuman[cntLin - matVirusDim][cntCol];
                }
                for(int cnt = 'a'; cnt <= 'z'; ++ cnt){
                    virusCurrentApparitions[cnt] += letterUp[cntCol][cnt];
                }
                if(cntCol - matVirusDim >= 1){
                    for(int cnt = 'a'; cnt <= 'z'; ++ cnt){
                        virusCurrentApparitions[cnt] -= letterUp[cntCol - matVirusDim][cnt];
                    }
                }
                
                if(cntCol - matVirusDim >= 0){
                    bool validation = true;
                    for(int cnt = 'a'; cnt <= 'z'; ++ cnt){
                        if(virusCurrentApparitions[cnt] != virusApparitions[cnt])
                            validation = false;
                    }
                    if(validation)
                        ++ ans;
                }
                
            }
        }
    }
    
    out<<ans;
            
    
    
    return 0;
}