#include <stdio.h>
#include <stdlib.h>
#include <stdlib.h>
int  main(){  printf("\n");
FILE *f,*f1;
char c,c0,c1;int i,j=0,k=0;
char filename[10]="input.txt",filename1[11]="output.txt";
f=fopen(filename,"r");
f1=fopen(filename1,"w");
fscanf(f,"%c",&c0);
fscanf(f,"%c",&c1);
if (c0>='0'&&c0<='9'&&c1>='0'&&c1<='9') {
fseek(f,0,0);
fscanf(f,"%c",&c0);
if (!feof(f)){
while(!feof(f)){


fscanf(f,"%c",&c);printf("%c",c);
c1=c;
if (c0==c1) {k++;}
if (c0!=c1) {fprintf(f1,"%d%c",k+1,c0);k=0;j++;}
c0=c;

 }       } fprintf(f1,"%d%c",k,c0);j++;}
 else
 if (c0>'0'&&c0<='9') fprintf(f1,"1%c",c0);

fclose(f);




return 0;
}