while(true){
switch(weekday){
case 0:
println("月");
break;
case 1:
println("月");
break;
case 2:
println("火");
break;
case 3:
println("水");
break;
case 4:
println("木");
break;
case 5:
println("金");
break;
case 6:
println("金");
break;
}
}