#include
#include
using namespace std;
int main(){
char a[100];
cin>>a;
int count=0;
char ch=a[0];
int i=0;
while(a[i]!='\0'){
if(ch==a[i]){
count++;
}
else {
if(count>1){
cout<<ch<<count;
ch=a[i];
count=1;
}
else if(count==1){
cout<<ch;
ch=a[i];
count=1;
}
}
i++;
}
cout<<ch;
return 0;
}