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//Lost in the City
//微软苏州校招笔试 12月27日 Problem A
#include<algorithm>
#include<bitset>
#include<cassert>
#include<cctype>
#include<cfloat>
#include<climits>
#include<cmath>
#include<complex>
#include<cstdio>
#include<cstring>
#include<ctime>
#include<deque>
#include<iostream>
#include<list>
#include<map>
#include<numeric>
#include<queue>
#include<set>
#include<sstream>
#include<stack>
#include<string>
#include<vector>
using namespace std;
char mp[210][210];
int main(){
    char hi[16];
    int n;
    int m;
    int i;
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