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

void catCHuoi(char *ten){
    int i=0;
    for (int i = 0; i < strlen(ten); i++) {
        if(ten[i]!=NULL && ten[i]!=32){
            cout<<ten[i];
        }else{
            cout<<endl;
        }
    }
}

void dequi(char *ten, int start, int end){
    if(start >= end) return;
    char temp;
    temp = *(ten+start);
    *(ten+start) = *(ten+end);
    *(ten+end) = temp;
    dequi(ten,++start,--end);
}

int main()
{
    char *ten = new char[255];
    cout<<"Nhap ten: ";gets(ten);
    int n = strlen(ten)-1;
    catCHuoi(ten); 
    dequi(ten,0,strlen(ten)-1);
    cout<<ten;
    delete[] ten;
    return 0;
}