#include<stdio.h>
int main(void)
{char r,w,x;
int summ=0;
scanf("%c%c%c", &r
,&w
,&x
); switch(r){
case 'r':
summ+=4;
case '-':
switch(w){
case 'w':
summ+=2;
case '-':
switch(x){
case 'x':
summ+=1;
case '-':
break;
default:
break;
}break;
default:
break;
}break;
default:
break;
}
return 0;
}
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