重复不用考虑，如下不用考虑
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//====================================================================||
// ||
// ||
// 作者：GCA ||
// 6AE7EE02212D47DAD26C32C0FE829006 ||
//====================================================================||
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <climits>
#include <vector>
#include <set>
#include <map>
#include <queue>
#include <cctype>
#include <utility>
using namespace std;
#ifdef ONLINE\_JUDGE
#define ll "%lld"
#else
#define ll "%I64d"
#endif
typedef unsigned int uint;
typedef long long int Int;
#define Set(a,s) memset(a,s,sizeof(a))
#define Write(w) freopen(w,"w",stdout)
#define Read(r) freopen(r,"r",stdin)
#define Pln() printf("\\n")
#define I\_de(x,n)for(int i=0;i<n;i++)printf("%d ",x\[i\]);Pln()
#define De(x)printf(#x"%d\\n",x)
#define For(i,x)for(int i=0;i<x;i++)
#define CON(x,y) x##y
#define Pmz(dp,nx,ny)for(int hty=0;hty<ny;hty++){for(int htx=0;htx<nx;htx++){\\
printf("%2d ",dp\[htx\]\[hty\]);}Pln();}
#define M 55
#define PII pair<int,int\>
#define PB push\_back
#define oo INT\_MAX
#define Set\_oo 0x3f
#define Is\_debug true
#define debug(...) if(Is\_debug)printf("DEBUG: "),printf(\_\_VA\_ARGS\_\_)
#define FOR(it,c) for(\_\_typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define eps 1e-6
bool xdy(double x,double y){return x>y+eps;}
bool xddy(double x,double y){return x>y-eps;}
bool xcy(double x,double y){return x<y-eps;}
bool xcdy(double x,double y){return x<y+eps;}
int min3(int x,int y,int z){
int tmp=min(x,y);
return min(tmp,z);
}
int max3(int x,int y,int z){
int tmp=max(x,y);
return max(tmp,z);
}
int bd\[10\]\[7\]={
{1,1,1,1,1,1,0},
{0,1,1,0,0,0,0},
{1,1,0,1,1,0,1},
{1,1,1,1,0,0,1},
{0,1,1,0,0,1,1},
{1,0,1,1,0,1,1},
{1,0,1,1,1,1,1},
{1,1,1,0,0,0,0},
{1,1,1,1,1,1,1},
{1,1,1,1,0,1,1}
};
int dd\[10\];
int t\[20\];
int n;
void pre(){
for(int i=0;i<10;i++){
int x=0;
for(int j=0;j<7;j++){
if(bd\[i\]\[j\])x|=(1<<j);
}
dd\[i\]=x;
// debug("n %d\\n",dd\[i\]);
}
}
bool check(int x){
bool bad\[7\];
Set(bad,0);
for(int i=x,j=0;j<n;i--,j++){
if(~(~t\[j\]|dd\[i\])!=0)return false;
for(int k=0;k<7;k++){
if(bad\[k\]&&((t\[j\]>>k)&1))return false;
if(!((t\[j\]>>k)&1)&&(dd\[i\]>>k)&1){
bad\[k\]=1;
}
}
}
return true;
}
int main(){
pre();
//freopen("input.txt","r",stdin);
ios\_base::sync\_with\_stdio(0);
while(~scanf("%d",&n)&&n){
Set(t,0);
for(int i=0;i<n;i++){
char str\[10\];
scanf("%s",str);
for(int j=0;j<7;j++){
if(str\[j\]=='Y')t\[i\]|=(1<<j);
}
}
bool suc=false;;
for(int i=9;i>=n-1;i--){
if(check(i)){
suc=true;
break;
}
}
printf("%s\\n",suc?"MATCH":"MISMATCH");
}
}