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#include<bits/stdc++.h>
using namespace std;
int t,rez;
string s;
int main(){
ifstream fin("cifra.in");
ofstream fout("cifra.out");
fin>>t;
for(int i=1;i<=t;i++){
fin>>s;
rez=0;
for(int j=0;j<=9;j++)
if(int(s[s.length()-2]-48)==j){
if(int(s[s.length()-1]-48)==0) rez=0-j;
if(int(s[s.length()-1]-48)==1) rez=1-j;
if(int(s[s.length()-1]-48)==2) rez=5-j;
if(int(s[s.length()-1]-48)==3) rez=2-j;
if(int(s[s.length()-1]-48)==4) rez=8-j;
if(int(s[s.length()-1]-48)==5) rez=3-j;
if(int(s[s.length()-1]-48)==6) rez=9-j;
if(int(s[s.length()-1]-48)==7) rez=6-j;
if(int(s[s.length()-1]-48)==8) rez=0-j;
if(int(s[s.length()-1]-48)==9) rez=9-j;
}
if(rez<0) rez=10+rez;
fout<<rez<<endl;
}
return 0;
}