#include <stdio.h>
#include <math.h>
int main(){
	char a[10000];
	int m=0;
	while((scanf("%c",&a[m]))!=-1){
		if(a[m]=='\n'){
			continue;
		}
		m++;
	}
	int n,b[10000];
	n=sqrt(m);
	for(int i=0;i<m;i++){
		a[i]=a[i]-'0';
	}
	int number=0,counter=0;
	if(a[0]!=0){
		b[0]=0;
	    number=1,counter=0;
	    for(int i=0;i<m;){
			if(number%2!=0){
				while(a[i]==1){
					counter++;
					i++;
				}
				b[number]=counter;
				counter=0;
			}
			if(number%2==0){
				while(a[i]==0){
					counter++;
					i++;
				}
				b[number]=counter;
				counter=0;
			}	
			number++;		
		}
	}
	if(a[0]==0){
	    for(int i=0;i<m;){
			if(number%2!=0){
				while(a[i]==1){
					counter++;
					i++;
				}
				b[number]=counter;
				counter=0;
			}
			if(number%2==0){
				while(a[i]==0){
					counter++;
					i++;
				}
				b[number]=counter;
				counter=0;
			}	
			number++;		
		}
	}	
    printf("%d ",n);
    for(int i=0;i<number;i++){
		printf("%d ",b[i]);
	}
	return 0;
}