{Arhiva de probleme - Matrix}

const
     dim = 1000;

var
   n,m,i,j : integer;
   f: text;
   t: char;
   c: array[1..dim,1..dim] of char;
   a: array[0..dim,0..dim] of longint;
   b: array[1..dim,1..dim] of boolean;
   x: array['a'..'z'] of longint;

begin
assign(f, 'matrix.in');
reset(f);
readln(f, n, m);
for i := 1 to n do
    begin
    for j := 1 to n do
        begin
        read(f,t);
        c[i,j] := t;
        end;
    readln(f);
    end;
for i :=1 to m do
    begin
    for j:=1 to m do
        begin
        read(f,t);
        inc(x[t]);
        end;
    readln(f);
    end;
close(f);

for i:=1 to n do for j:=1 to n do
    if (i>=m) and (j>=m) then
        b[i,j]:=true
    else
        b[i,j] := false;

for t := 'a' to 'z' do
    begin
    for i:=1 to n do for j:=1 to n do a[i,j] := 0;
    for i:=1 to n do for j:=1 to n do
        begin
        if c[i,j] = t then
           a[i,j]:= a[i,j-1] + a[i-1, j] - a[i-1,j-1] + 1
        else
           a[i,j]:= a[i,j-1] + a[i-1, j] - a[i-1,j-1];
        if (i>=m) and (j>=m) then
           if (a[i,j]-a[i-m,j]-a[i,j-m]+a[i-m,j-m] <> x[t]) then
              b[i,j] := false;
        end;
    end;

m := 0;
for i:=1 to n do for j:=1 to n do
    if (b[i,j]) then
       inc(m);

assign(f,'matrix.out');
rewrite(f);
writeln(f,m);
close(f);
end.