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水#include <stdio.h>
int i(char *t){
int r=0;
for(int i=0;i<7;i++){
r |= ((t[i]=='Y') << i);
}
return r;
}
int main() {
int g[10] = {63,6,91,79,102,109,125,7,127,111};
int n;
while(1){
scanf("%d",&n);
if(!n)return 0;
int d = n;
int a[10];
while(d--){
char t[10];
scanf("%s",t);
a[d]=i(t);
}
bool k=0;
for(int j=0;j<=10-n;j++){
bool K=1;
int h=0;
for(int q=n-1;q>=0;q--){
if((a[q]&g[j+q])^a[q]){
K=0; break;
}
int H=(a[q]^g[j+q])|h, O=a[q];
if(O&H){
K=0; break;
}
h=H;
}
if(K){
k=1;
break;
}
}
if(k) printf("MATCH\n");
else printf("MISMATCH\n");
}
return 0;
}
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