#include <cstdio>
#include <cstring>
FILE *f=fopen("strmatch.in","r");
FILE *g=fopen("strmatch.out","w");
char A[2000001],B[2000001];
int M,N,i,j,k;
int v[1001],lps[2000001];


void creare_lps(int M, int lps[], char A[])
{
    int len=0, i=1;
    lps[0]=0;
    while(i<M)
    {
        if(A[len]==A[i])
        {
            len++;
            lps[i]=len;
            i++;
        }
        else
        {
            if(len!=0)
                len=lps[len-1];
            else
            {
                lps[i]=0;
                i++;
            }
        }
    }
}


int main()
{
    fscanf(f,"%s %s",A,B);
    
    M=strlen(A);
    N=strlen(B);
    
    creare_lps(M,lps,A);
    
    i=0;
    j=0;
    while(i<N)
    {
        if(B[i]==A[j])
        {
            i++;
            j++;
        }
        
        if(j==M)
        {
            if(k<=1000)
            {
                k++;
                v[k]=i-j;
            }
            else
                break;
            j=lps[j-1];
        }
        else
        if(B[i]!=A[j])
        {
            if(j!=0)
                j=lps[j-1];
            else
                i++;
        }
    }
    
    
    fprintf(g,"%d\n",k);
    for(i=1;i<=k;i++)
        fprintf(g,"%d ",v[i]);
        
    fclose(f);
    fclose(g);
    
    return 0;
}