#include <stdio.h>
#include<string.h>
int main() {
char a[50]={0};
int x=0,y=0;
scanf("%s",a);
x=strlen(a);
for(int i=0;i<x;i++)
{
if(a[i]==a[i+1])
{
y=y+5;
}
else
{
y=y+10;
}
}
printf("%d",y);
}
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