#include <stdio.h>
int main(void) {
int a;
switch(a){
case 1:
break;
case 11:
break;
case 12:
break;
case 13:
break;
case 2 :
case 3 :
case 4 :
case 5 :
case 6 :
case 7 :
case 8 :
case 9 :
case 10 :
break;
default :
break;
}
return 0;
}
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