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#include <cstdio>
#include <iostream>
#include <cstring>
#define NMAX 20000002
#define N 1002
using namespace std;
int poz[NMAX], nr, sol[N];
char c[NMAX], s[NMAX];
int main()
{
freopen("strmatch.in", "r", stdin);
freopen("strmatch.out", "w", stdout);
scanf("%s", c);
scanf("%s\n", s);
int i=1, j=0, n=strlen(c), m=strlen(s);
while(i<n)
{
if(j!=0 && c[j+1]!=c[i])
j=poz[j];
if(c[j+1]==c[i])
i++;
poz[i]=j;
i++;
}
i=0; j=0;
while(i<m)
{
while(j && c[j+1]!=s[i])
j=poz[j];
if(c[j+1]==s[i])
j++;
if(j==n-1)
{
j=poz[n-1];
nr++;
if(nr<=1000)
sol[nr]=i-n+1;
}
i++;
}
if(nr>=1000)
nr=1000;
printf("%d\n", nr);
for(i=1;i<=nr;i++)
printf("%d ", sol[i]);
return 0;
}