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#include <cstdio>
#include <cstring>
#define LMAX 2000005
using namespace std;
char a[LMAX], b[LMAX];
int p[LMAX], n, m, nr, pozitii[LMAX];
void constructP()
{
int i=0, j=-1;
p[0]=-1;
while(i<m)
{
while(j>=0 && a[i]!=a[j])
j=p[j];
i++;
j++;
p[i]=j;
}
}
int main()
{
freopen("strmatch.in", "r", stdin);
freopen("strmatch.out", "w", stdout);
scanf("%s\n%s", a, b);
m=strlen(a);
n=strlen(b);
constructP();
int i=0, j=0;
while(i<n)
{
while(j>=0 && b[i]!=a[j])
j=p[j];
i++;
j++;
if(j == m)
{
j=p[j];
nr++;
if(nr<=1000)
pozitii[nr]=i-m;
}
}
printf("%d\n", nr);
if(nr>1000)
nr=1000;
for(int i=1; i<=nr; i++)
printf("%d ", pozitii[i]);
return 0;
}