#include <iostream>
#include <stdio.h>
#define NMax 2000005

using namespace std;

int N,M;
char A[NMax],B[NMax];
int pi[NMax],pos[1024];

void make_prefix(void)
{
    int i,q=0;
    for(i=2,pi[1]=0;i<=M;++i)
    {
        while(q && A[q+1]!=A[i])
            q=pi[q];
        if(A[q+1]==A[i])
            ++q;
        pi[i]=q;
    }
}
int main(void)
{
    int i,q=0,n=0;
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    fgets(A,sizeof(A),stdin);
    fgets(B,sizeof(B),stdin);
    for(;(A[M]>='A' && A[M]<='Z') || (A[M]>='a' && A[M]<='z') || (A[M]>='0' && A[M]<='9');++M);
    for(;(B[N]>='A' && B[N]<='Z') || (B[N]>='a' && B[N]<='z') || (B[N]>='0' && B[N]<='9');++N);
    make_prefix();
    for(i=1;i<=N;++i)
    {
        while(q && A[q+1]!=B[i])
            q=pi[q];
        if(A[q+1]==B[i])
            ++q;
        if(q==M)
        {
            q=pi[M];
            ++n;
            if(n<=1000)
                pos[n]=i-M;
        }
    }
    printf("%d\n",n);
    for(i=1;i<=min(n,1000);++i)
        printf("%d",pos[i]);
    printf("\n");
    return 0;
}