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#include <cstdio>
#include <cstring>
#define NMAX 2000002
using namespace std;
int poz[NMAX], nr, sol[NMAX];
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(c[i]==c[j])
poz[i]=++j;
else
if(i==1)
poz[i]=0;
else
{
while(c[i]!=c[j])
{
j--;
if(j==0)
break;
}
poz[i]=poz[j];
}
i++;
}
i=0, j=0;
while(i<m)
{
if(c[j]==s[i])
{
i++, j++;
}
else
if(j!=0)
j=poz[j-1];
else
i++;
if(j==n)
sol[nr++]=i-n;
}
printf("%d\n", nr);
for(i=0;i<nr;i++)
printf("%d ", sol[i]);
return 0;
}