#include <cstdio>
#include<string.h>
#define MAXN 2000000
#define MAXR 1000

char s[2*MAXN+2];
int n, z[2*MAXN+2], m, rasp[MAXR+1], k;

int main()
{
    freopen("strmatch.in", "r", stdin);
    freopen("strmatch.out", "w", stdout);

    int i, l, r;

    gets(s), n=strlen(s);
    s[n]='#';
    gets(s+n+1), m=strlen(s);

    l=r=0;
    for(i=1;i<=m;++i)
    {
        if(i>r)
        {
            l=r=i;
            while(r<=m && s[r]==s[r-l]) ++r;
            z[i]=r-l, --r;
        }
        else
        {
            if(z[i-l] < r-i+1) z[i]=z[i-l];
            else
            {
                l=i;
                while(r<=m && s[r]==s[r-l]) ++r;
                z[i]=r-l, --r;
            }
        }
    }

    for(i=n+1;i<=m;++i)
        if(z[i] == n)
        {
            k++;
            if(k<=MAXR)
                rasp[k]=i-n-1;
        }
    printf("%d\n", k);
    for(i=1;i<=MAXR && i<=k;++i)
        printf("%d ", rasp[i]);
    return 0;
}