#include<cstdio>
int a,v,c;int p(){a?putchar(a%10+48),a/=10,p():0;}main(){while(0<(c=getchar()))c==v&c>10?a++:(a>1?p():0,c>47&c<58|c==92?putchar(92):0,putchar(v=c),a=1);}