#include <cstdio>
#include <cstring>
#define mlength 2097152

using namespace std;

char str[mlength],srch[mlength];
int n,m;
int pushbacks[mlength];
int sol[mlength],solNr;

int takeMin(int x,int y) {
    return (x<y)*(x-y)+y;
}

void read() {
    scanf("%s%s",srch,str);
    m=strlen(srch);
    n=strlen(str);
}

void formPushbacks() {
    int i;
    for(i=1;i<m;++i) {
        if(srch[i]==srch[0]) {
            pushbacks[i]=1;
            break;
        }
    }
    for(++i;i<m;++i) {
        if(srch[i]==srch[pushbacks[i-1]]) {
            pushbacks[i]=pushbacks[i-1]+1;
        }
        else {
            pushbacks[i]=0;
        }
    }
}

void strstr() {
    int i,j;
    for(i=0,j=0;i<n;++i) {
        if(str[i]==srch[j]) {
            ++j;
            if(j==m) {
                sol[solNr++]=i+1-j;
                j=pushbacks[j-1];
            }
        }
        else {
            if(j) {
                j=pushbacks[j-1];
                --i;
            }
        }
    }
}

void kmp() {
    formPushbacks();
    strstr();
}

void display() {
    int i;
    printf("%d\n",solNr);
    solNr=takeMin(solNr,1000);
    for(i=0;i<solNr;++i) {
        printf("%d ",sol[i]);
    }
}

int main()
{
    freopen("strmatch.in","r",stdin);
    freopen("strmatch.out","w",stdout);
    read();
    kmp();
    display();
    return 0;
}