#include<bits/stdc++.h>

using namespace std;

#define int long long

int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

string l[500];

string c=".abcdefghijklmnopqrstuvwxyz";

signed main(){

ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);

int t,n,m,s=0;cin>>t;

int a[27]={0},b[27]={0};//a紀錄順序 b紀錄每個字母出現次數 

queue<int>q;

for(int w=1;w<=t;w++){

cin>>n>>m;

for(int i=0;i<n;i++)cin>>l[i];

cout<<"World #"<<w<<"\n";

bool v[500][500]={false};

for(int i=0;i<n;i++)for(int j=0;j<m;j++)if(!v[i][j]){

//cout<<i<<","<<j<<"wow\n";

v[i][j]=true;

int r=l[i][j]-'a'+1;//1~26

if(b[r]==0)a[s]=r,s++;

b[r]++;

q.push(i*m+j);

while(q.size()>0){

//cout<<"waw\n";

int x=q.front()/m,y=q.front()%m;q.pop();

v[x][y]=true;

for(int d=0;d<4;d++)if(x+dx[d]>=0)if(x+dx[d]<n)if(y+dy[d]>=0)if(y+dy[d]<m)if(!v[x+dx[d]][y+dy[d]])if(c[r]==l[x+dx[d]][y+dy[d]])

q.push((x+dx[d])*m+y+dy[d]),v[x+dx[d]][y+dy[d]]=true;

}

}

for(int i=0;i<s;i++)cout<<c[a[i]]<<": "<<b[a[i]]<<"\n",b[a[i]]=0,a[i]=0;

s=0;

}

}

再不看清楚題目阿笑死