#include <bits/stdc++.h>
#include <cassert>

using namespace std;

typedef long long ll;
typedef long double ld;

// read template
long long readInt(long long l,long long r,char endd){
	long long x=0;
	int cnt=0;
	int fi=-1;
	bool is_neg=false;
	while(true){
		char g=getchar();
		if(g=='-'){
			assert(fi==-1);
			is_neg=true;
			continue;
		}
		if('0'<=g && g<='9'){
			x*=10;
			x+=g-'0';
			if(cnt==0){
				fi=g-'0';
			}
			cnt++;
			assert(fi!=0 || cnt==1);
			assert(fi!=0 || is_neg==false);
			
			assert(!(cnt>19 || ( cnt==19 && fi>1) ));
		} else if(g==endd){
			assert(cnt>0);
			if(is_neg){
				x= -x;
			}
			assert(l<=x && x<=r);
			return x;
		} else {
			assert(false);
		}
	}
}

string readString(int l,int r,char endd){
	string ret="";
	int cnt=0;
	while(true){
		char g=getchar();
		assert(g!=-1);
		if(g==endd){
			break;
		}
		cnt++;
		ret+=g;
	}
	assert(l<=cnt && cnt<=r);
	return ret;
}

long long readIntSp(long long l,long long r){
	return readInt(l,r,' ');
}

long long readIntLn(long long l,long long r){
	return readInt(l,r,'\n');
}

string readStringLn(int l,int r){
	return readString(l,r,'\n');
}

string readStringSp(int l,int r){
	return readString(l,r,' ');
}
// end

void solve()
{
	int n = readIntLn(1, 100);
	string s = readStringLn(n, n);
	bool ch = true;
	for (int i = 0; i < n; i++) ch &= ('a' <= s[i] && s[i] <= 'z');
	assert(ch);
	for (int i = 0; i < n - 1; i += 2) swap(s[i], s[i + 1]);
	for (int i = 0; i < n; i++) s[i] = (char)((int)'a' + (int)'z' - (int)s[i]);
	cout << s << "\n";
}

int main()
{ 
	int T = readIntLn(1, 1000);
	while (T--) solve();	
	assert(getchar() == -1);	
	return 0;
}