// KMP
// By C0$tume|
#include <cstdio>
#include <cstring>
#define in "strmatch.in"
#define out "strmatch.out"
#define _NMAX 2000005
#define minim( a , b ) ((a<b) ? a : b)

using namespace std;

char A[_NMAX],B[_NMAX];
int pi[_NMAX],M,N;

void prefix()
{
    int i,q;
    for(i=2,q=0;i<=N;i++)
    {
        while(q && A[i]!=A[q+1])
            q=pi[q];
        if(A[i]==A[q+1])
            ++q;
        pi[i]=q;
    }
}


int main()
{
    int Interv[_NMAX];
    int i,q,TOTAL=0;
    freopen(in,"r",stdin);
    freopen(out,"w",stdout);

    fgets(A+1,_NMAX,stdin);
    fgets(B+1,_NMAX,stdin);

    N=strlen(A+1);
    M=strlen(B+1);
    --N;
    --M;


    prefix();

    for(i=1,q=0;i<=M;i++)
    {
        while(q && A[q+1]!=B[i])
            q=pi[q];
        if(A[q+1]==B[i])
            ++q;
        if(q==N)
        {
            ++TOTAL;
            if(TOTAL<=1000)
                Interv[TOTAL]=i-N;
        }
    }
    printf("%d \n",TOTAL);
    if(TOTAL>1000)
        TOTAL=1000;
    for(i=1;i<=TOTAL;i++)
        printf("%d ",Interv[i]);
    return 0;
}