样例都没过，求调

#include<bits/stdc++.h>
using namespace std;
long long n;
string A,B="\0",C="\0";
struct {
	string a;
	string b;
}s[109];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>s[i].a>>s[i].b;
	}
	cin>>A;
	for(int i=0;i<=A.size()-1;i++){
		if(A[i]>=97&&A[i]<=122){
			C=C+A[i];
			continue;
		}if((A[i-1]>=97&&A[i-1]<=122&&(A[i]<97||A[i]>122))||(A[i+1]=='\0'&&A[i]>=97&&A[i]<=122)){
			int flag=0;
			for(int j=1;j<=n;j++){
				if(s[j].a==C){
					B+=s[j].b;
					B+=A[i];
					flag=1;
					break;
				}
			}C="\0";
			if(flag==0){
				B+="UNK"; 
			}
		}else{
			B+=A[i];
		}
	}
	cout<<B<<endl;
	return 0;
}