#include<cstdio>
#include<cstring>
char a[2000010],b[2000010];
int prefix[2000010],sol[1010],n,m;
void solve_prefix(){
    int i=0,j;
    prefix[1]=0;
    for(j=2;j<=m;j++){
        while(i>0&&a[i+1]!=a[j])
            i=prefix[i];
        if(a[i+1]==a[j])
            i++;
        prefix[j]=i;
    }
}
int main(){
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    int i=0,j;
    scanf("%s%s",&a,&b);
    m=strlen(a);
    n=strlen(b);
    for(i=m;i>=1;i--)
        a[i]=a[i-1];
    for(i=n;i>=1;i--)
        b[i]=b[i-1];
    a[i]=b[i]=NULL;
    solve_prefix();
    for(j=1;j<=n;j++){
        while(i>0&&a[i+1]!=b[j])
            i=prefix[i];
        if(a[i+1]==b[j])
            i++;
        if(i==m){
            i=prefix[m];
            sol[0]++;
            if(sol[0]<=1000)
                sol[sol[0]]=j-m;
        }
    }
    printf("%d\n",sol[0]);
    if(sol[0]>1000)
        sol[0]=1000;
    for(i=1;i<=sol[0];i++)
        printf("%d ",sol[i]);
    return 0;
}