//#define debug //*******************************************************************************************************************************************
#ifdef debug
#include <chrono>
#endif

#include <iostream>
#include <algorithm> // next_permutation
#include <iomanip>
#include <cmath>
#include <vector>
#include <sstream>
#include <string>
#include <cstring> //memcpy
#include <cstdio>
#include <stack>
#include <queue>
#include <list>
#include <numeric> //accumulate
//#include <map>
//#include <unordered_map> //hash func.
#include <fstream> //ifstream, ofstream

//#define NDEBUG //If NDEBUG is defined before #include <cassert>, assert will be ignored. You had better define NDEBUG when u submit the code.
#include <cassert> //assert

using namespace std;


#define dout cout
//If u wanna output to a text file instead of standard output, plz define OUTPUTFILE.
//#define OUTPUTFILE "output.txt" //*******************************************************************************************************************************************
#ifdef OUTPUTFILE
#define dout outputfile
ofstream outputfile(OUTPUTFILE);
#define OutputFilePath "/Users/Nag/Documents/Prgm/Test/DerivedData/Test/Build/Products/Debug/output.txt"
#endif


#define din cin
//If u wanna input from a text file instead of standard input, plz define INPUTFROMTEXTFILE???.
//#define INPUTFILE "input.txt" //*******************************************************************************************************************************************
#ifdef INPUTFILE
#define din inputfile
ifstream inputfile(INPUTFILE);
#endif

#define scan(A) scanf("%d", &(A))
#define disp(A) dout << #A << " = " << setw(3) << (A) << endl
#define disP(A) dout << setw(3) << (A) << " "
#define rep(i,a,n) for(int (i)=(a); (i)<(n); (i)++)
#define dispAll(A,n) dout << #A << " = "; rep(j, 0, (n)) {disP(A[j]);} dout << endl
//#define dispAll(A,n) cout << #A << " = "; rep(j, 0, (n)) {cout << setw(3) << A[j] << " ";} cout << endl

#define sign(x) ((x)>0)-((x)<0) //x<0: -1, x=0: 0, x>0: +1
#define p(i) (i)/2
#define l(i) (i)*2
#define r(i) (i)*2+1

int dx[] = {1,-1, 0, 0, 1, 1,-1,-1}; //???????????????????????????????¨??????????????????????????????????
int dy[] = {0, 0,-1, 1,-1, 1, 1,-1};

typedef pair<int,int> pii;
typedef vector<int> vi;
typedef long long ll;
typedef unsigned long ull;

const int INF = 2e9+10;
const ll INF_LL = 9e18; //Be careful for overflow.
const ll INF_ULL = 1e19;
const int NONE = -1;
const ll MOD = 1e9+7;

const int N_MAX = 51; //num of vertex or element
const int M_MAX = 100000; //num of edge
const int DATA_MAX = 1000000010;

int N;

string T, P;


void display() {
    
    dout << "----\n";
    rep(i,0,N) {
        disP(i); dout << " = " << endl;
    }
    dout << "----\n";
    dout << "----\n";
}



int main() {
    //------------------------------------------------------------------------------------------
#ifdef debug
    //start timer
    auto startTime = chrono::system_clock::now();
#endif
    //------------------------------------------------------------------------------------------
    
    //cin, cout????????????  ?????¨??????cin?????????????????¨??¨cin??§???scanf?????????????????¨??¨scanf??§??±?????????????????????
    cin.tie(0); //cin??¨cout??????????????????
    ios::sync_with_stdio(false); //iostream??¨stdio??????????????????
    
    //read input data
    din >> T >> P;
    
    int TL = T.size();
    int PL = P.size();
    
    //calc.
    const int B = MOD;
    
    int t = 1;
    rep(i,0,PL) t*=B; //pow(B,PL)
    
    int TH = 0, PH = 0;
    rep(i,0,PL) TH = TH*B + T[i];
    rep(i,0,PL) PH = PH*B + P[i];
    
    rep(i,0,TL-PL+1) {
#ifdef debug
        dout<<"-------------\n";
        disp(i);
        disp(TH);
        disp(PH);
#endif
        if(TH==PH) {
            dout << i << endl;
#ifdef debug
            dout<<"////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////\n";
#endif
        }
        
        if(i+PL<TL) TH = TH*B - T[i]*t + T[i+PL];
    }
    
    
    
    
    
#ifdef debug
    display();
    string subT;
    rep(i,0,TL-PL+1) {
        subT = T.substr(i,PL);
        
        if(P==subT) {
            dout << i << endl;
        }
    }
#endif
    
    //------------------------------------------------------------------------------------------
#ifdef debug
    //stop timer
    auto endTime = chrono::system_clock::now();
    auto dur = endTime - startTime;
    auto msec = chrono::duration_cast<chrono::milliseconds>(dur).count();
    dout << fixed << setprecision(4) << (double)msec/1000 << " sec \n";
#endif
    //------------------------------------------------------------------------------------------
    
#ifdef INPUTFILE
    inputfile.close();
#endif
    
#ifdef OUTPUTFILE
    outputfile.close();
    cout << "\"" << OutputFilePath << "\"" << endl;
#endif
    
    return 0;
}

Measured memory_bytes: 4496