#include<cstdio>
#include<cstring>
#define N 2000001
char s[N],u[N],r[2*N];
int v[1000],i,t,k,m,n,p[N],l;
void S(int b,char c)
{
    char e[100];
    int j;
    for(j=0;b;b/=10,j++)
        e[j]=b%10+'0';
    for(j--;j>=0;j--)
        r[l++]=e[j];
    r[l++]=c;
}
int main()
{
    freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),scanf("%s\n%s",s,u),m=strlen(s),n=strlen(u);
    for(i=m;i;i--)
        s[i]=s[i-1];
    for(i=n;i;i--)
        u[i]=u[i-1];
    for(i=2;i<=m;p[i++]=k)
	{
        for(;k&&s[k+1]!=s[i];k=p[k]);
        if(s[k+1]==s[i])
            k++;
    }
    for(k=0,i=1;i<=n;i++)
	{
        for(;k&&s[k+1]!=u[i];k=p[k]);
        if(s[k+1]==u[i])
            k++;
        if(k==m)
		{
            if(t<1000)
                v[t]=i-m;
            k=p[m],t++;
        }
    }
    S(t,'\n'),t=t<1000?t:1000;
    for(i=0;i<t;i++)
        S(v[i],' ');
    fwrite(r,1,l,stdout);
}