#include <stdio.h>
#include <string.h>

#define MAX 3000000

int main(){
	char s[MAX];
	char t[MAX];
	int i = 0;
	freopen("encoding.in", "r", stdin);
	while (scanf("%c",&s[i])!=EOF)
	{
		if (s[i] == '\n')
		{
			int j,l=1,u=0,m=0;
			for (j = 0; j<i; j++){
				if (j<i-1 && s[j+1] == s[j])
				{
					t[j] = l; u++;
					if (u == 9) l++;

				
				} else if (j>0 && s[j-1] == s[j]) {
					t[j] = l++; u=1;
					if (u == 9) {u=0;l++;}
				}
				else {
					t[j] = 0;
				}
			}
			for (j = 0; j<i; j++){
				if (t[j] == 0)
				{	
					if ((j==0) || t[j-1] != 0) printf("1");
					printf("%c", s[j]);
					if (s[j]=='1') printf("1");
					if ((j==i-1) || t[j+1] != 0) printf("1");
				} else {
					if ((j==0) || t[j-1] != t[j]){m = 0;}
					m++;
					if ((j==i-1) || t[j+1] != t[j]){
					printf("%d%c",m,s[j]);
					/*if (s[j]=='1') printf("1");*/
					}
				}
			}
		printf("\n");i=-1;
		}
		i++;
	}

	return 0;
}