#include <iostream>
#include <cstdio>
#include <string.h>
using namespace std;

const int lmax = 2000000;
char A[lmax], B[lmax];
int lcp[lmax];
bool match[lmax];

void preProcessKMP(){
	int i,j,n;
	n = strlen(A);
	j = 0, lcp[0] = 0;
	for(i=1; i<n;){
		if(A[i] == A[j]){
			lcp[i] = j+1;
			i++, j++;
		}
		else{
			if(j != 0)
				j = lcp[j-1];
			else{
				lcp[i] = 0;
				i++;
			}
		}
	}
}

int KMP(){
	int sol = 0, j = 0;
	int m = (int)strlen(B), n = (int)strlen(A);
	for(int i=0; i<m;){
		if(B[i] == A[j])
			i++, j++;
		else{
			if(j != 0)
				j = lcp[j-1];
			else
				i++;
		}
		if(j == n){
			sol++;
			match[i-n-1] = true;
			j = lcp[j-1];
		}
	}
	return sol;
}

int main()
{
	FILE *fin, *fout;
	fin = fopen("strmatch.in","r");
	fout = fopen("strmatch.out","w");
	fscanf(fin,"%s\n%s\n",A,B);
	preProcessKMP();
	int sol = KMP();
	fprintf(fout,"%d\n",sol);
	for(int i=0; i<(int)strlen(B); i++)
		if(match[i] == true)
			fprintf(fout,"%d ",i+1);
	fclose(fin);
	fclose(fout);
	return 0;
}