#include <cstdio>
#include <cstring>
#define maxl 2000005
#define maxp 1000

using namespace std;

char M[maxl],N[maxl];
int n,m,pos[maxl],res=0,prefix[maxl];

void Lesen();
void Prefix_schaffen();
void KMP();
void Schreiben();

int main(){
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    Lesen();
    Prefix_schaffen();
    KMP();
    Schreiben();
    return 0;
}
void Lesen(){
    M[0]=N[0]=' ';
    scanf("%s",N+1);n=strlen(N);
    scanf("%s",M+1);m=strlen(M);
}
void Prefix_schaffen(){
    int k=0;
    for(int i=2;i<n;i++){
        while(k && N[k+1]!=N[i])k=prefix[k];
        if(N[k+1]==N[i])k++;
        prefix[i]=k;
    }
}
void KMP(){
    int k=0;
    for(int i=1;i<m;++i){
        while(k && N[k+1]!=M[i])k=prefix[k];
        if(N[k+1]==M[i])k++;
        if(k==n-1){
            res++;
            if(res<=maxp)pos[res]=i-k;
        }
    }
}
void Schreiben(){
    printf("%d\n",res);
    if(res>maxp)res=maxp;
    for(int i=1;i<=res;i++)i==res?printf("%d\n",pos[res]):printf("%d ",pos[i]);
}