#include <iostream>
#include <vector>
#include <cstdio>
#define MAX_N 2000005
using namespace std;
char a[MAX_N], b[MAX_N];
FILE *fin=fopen("strmatch.in", "r");
FILE *fout=fopen("strmatch.out", "w");
vector <int> contor;
int main()
{
    fscanf(fin, "%s", a);
    fscanf(fin, "%s", b);
    int indexA=0, indexB=0, start_poz=-1;
    for (indexB=0; b[indexB]!='\0'; indexB++) {
        if (a[indexA]=='\0') {
            contor.push_back(start_poz);
            indexB=start_poz;
            start_poz=-1;
            indexA=0;
            continue;
        }
        //if (indexB==102) cout<<indexA<<endl;
        if (a[indexA]==b[indexB]) {
            if (start_poz==-1) {
                start_poz=indexB;
            }
            indexA++;
        }
        else {
            if (start_poz!=-1) {
                indexB=start_poz;
                start_poz=-1;
                indexA=0;
            }
        }
    }
    if (a[indexA]=='\0') {
        contor.push_back(start_poz);
        indexB=start_poz;
        start_poz=-1;
        indexA=0;
    }
    fprintf(fout, "%d\n", contor.size());
    int last_poz=contor.size();
    if (contor.size()>1000) last_poz=1000;
    for (int i=0; i<last_poz; i++) {
        fprintf(fout, "%d ", contor[i]);
    }
    return 0;
}