class Solution:
def find(self, string: str) -> str:
another = ""
for i in string:
if i in "LR":
another+= i
else:
if i == "U":
another+= "D"
else:
another+= "U"
return another
t = int(input())
for i in range(t):
n = int(input())
print(Solution().find(input()))
#include<bits/stdc++.h>
using namespace std;
# define ll long long int
# define scan(arr,v,w) for(int i=v;i<w;i++) cin>>arr[i];
# define print(arr,v,w) for(int i=v;i<w;i++) cout<<arr[i]<<" ";
# define tc ll t;cin>>t; while(t--)
# define fast ios::sync_with_stdio(0);cin.tie(0);
# define endl "\n"
int main(){
fast;
//***********************************************************************************************************************************************************************************************
//dry run is necessary
//see corner cases
tc{
int p;
cin>>p;
string s;
cin>>s;
for(int i=0;i<s.length();i++){
if(s[i]=='L' ||s[i]=='R'){
cout<<s[i];
}else if(s[i]=='U'){
cout<<"D";
}else if(s[i]=='D'){
cout<<"U";
}
}
cout<<endl;
}
//***********************************************************************************************************************************************************************************************
return 0;
}
1631B - Fun with Even Subarrays | 727A - Transformation from A to B |
822B - Crossword solving | 1623A - Robot Cleaner |
884B - Japanese Crosswords Strike Back | 862B - Mahmoud and Ehab and the bipartiteness |
429A - Xor-tree | 1675C - Detective Task |
950A - Left-handers Right-handers and Ambidexters | 672B - Different is Good |
1C - Ancient Berland Circus | 721A - One-dimensional Japanese Crossword |
1715B - Beautiful Array | 60B - Serial Time |
453A - Little Pony and Expected Maximum | 1715A - Crossmarket |
1715C - Monoblock | 1512C - A-B Palindrome |
1679B - Stone Age Problem | 402A - Nuts |
792A - New Bus Route | 221A - Little Elephant and Function |
492C - Vanya and Exams | 1369B - AccurateLee |
892B - Wrath | 999A - Mishka and Contest |
727C - Guess the Array | 1625C - Road Optimization |
1715D - 2+ doors | 267A - Subtractions |