def inverse(x):
if x == '1':
return '0'
return '1'
for _ in range(int(input())):
t = input()
if len(set(t)) == 1:
print(t)
continue
ans = t[0]
for i in t[1:]:
if i == ans[-1]:
ans += inverse(i) + i
else:
ans += i
print(ans)#include<bits/stdc++.h>
using namespace std;
int main(){
int t;
cin>>t;
while(t--){
string s;
cin>>s;
int n=s.length();
int z=0,o=0;
for(int i=0;i<n;i++){
if(s[i]=='0'){
z++;
}
else{
o++;
}
}
if(o==n || z==n){
cout<<s;
}
else{
string p="10";
string ans="";
for(int i=1;i<=n;i++){
ans+=p;
}
cout<<ans;
}
cout<<endl;
}
}1475A - Odd Divisor | 1454B - Unique Bid Auction |
978C - Letters | 501B - Misha and Changing Handles |
1496A - Split it | 1666L - Labyrinth |
1294B - Collecting Packages | 1642B - Power Walking |
1424M - Ancient Language | 600C - Make Palindrome |
1669D - Colorful Stamp | 1669B - Triple |
1669A - Division | 1669H - Maximal AND |
1669E - 2-Letter Strings | 483A - Counterexample |
3C - Tic-tac-toe | 1669F - Eating Candies |
1323B - Count Subrectangles | 991C - Candies |
1463A - Dungeon | 1671D - Insert a Progression |
1671A - String Building | 1671B - Consecutive Points Segment |
1671C - Dolce Vita | 1669G - Fall Down |
4D - Mysterious Present | 1316B - String Modification |
1204A - BowWow and the Timetable | 508B - Anton and currency you all know |