#include <iostream>
using namespace std;
int main()
{int testy,dg,jg,dm,jm;string czas;
cin>>testy;
while(testy--)
{///...................................................................
cin >>czas;
dg=czas[0]-48;jg=czas[1]-48;dm=czas[3]-48;jm=czas[4]-48;
while(true)
  {
  jm=jm+1;
  if(jm==10){jm=0;dm++;}
  if(dm==6){dm=0;jg++;}
  if(jg==10){jg=0;dg++;}
  if(dg==2&&jg==4){dg=0;jg=0;dm=0;jm=0;}
 
  if(dg==jm&&jg==dm){break;}
  if(dg==0&&jg==dm){break;}
  if(dg==0&&jg==0&&jm==dm){break;}
  if(dg==0&&jg==0&&dm==0){break;}
  }
cout<<dg<<jg<<':'<<dm<<jm<<endl;
}///...................................................................
return 0;
}
 

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OAowMDowMAowMDowMQowMDoxMQowMDoyMAowMzowMAoxNDo1OQoyMzo1OAoxNTo1MQ==

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