#include <iostream>
#include <fstream>
#include <string>
#include<algorithm>
#include <iomanip>
#include <iterator>
using namespace std;
void textProcessing(string &inputString);
int textProcessing(const string &inputString, char letter);
void textProcessing(string &inputString, char orgChar, char newChar);
int main() {
ofstream out("text.txt");
out<<"the earth is a very small stage in a vast cosmic arena";
out.close();
unsigned short operation;
cin >> operation;
string sentence;
fstream inputstream;
inputstream.open("text.txt");
while (!inputstream.eof()) {
getline(inputstream, sentence);
if (sentence.length() > 0) {
// Your code starts here
if (operation==0){
textProcessing(sentence);
}
else if(operation==1){
char rletter;
cin>>rletter;
if(isupper(rletter)){
cout<<"Invalid";
}
else {
int ans = textProcessing(sentence, rletter);
cout << ans;
}
}
else if(operation==2){
char orignal;
char newl;
cin>>orignal>>newl;
textProcessing(sentence,orignal,newl);
}
else{
cout<<"Invalid";
}
// Your code ends here
}
}
return 0;
}
void textProcessing(string &inputString){
inputString.erase(remove(inputString.begin(),inputString.end(),'a'),inputString.end());
inputString.erase(remove(inputString.begin(),inputString.end(),'o'),inputString.end());
inputString.erase(remove(inputString.begin(),inputString.end(),'u'),inputString.end());
inputString.erase(remove(inputString.begin(),inputString.end(),'w'),inputString.end());
inputString.erase(remove(inputString.begin(),inputString.end(),'y'),inputString.end());
inputString.erase(remove(inputString.begin(),inputString.end(),'i'),inputString.end());
inputString.erase(remove(inputString.begin(),inputString.end(),'e'),inputString.end());
cout<<inputString;
};
int textProcessing(const string &inputString, char letter){
int count=0;
auto it=find(inputString.rbegin(),inputString.rend(),letter);
int last_index =distance(inputString.begin(), (it + 1).base());
int first=inputString.find(letter);
int distance=(last_index-first);
return distance;
};
void textProcessing(string &inputString, char orgChar, char newChar){
if((isupper(orgChar))/*||(isupper(newChar))*/){
cout<<"Invalid";
}
else {
for (int i = 0; i <= inputString.length(); i++) {
if (inputString[i] == orgChar) {
inputString[i] = newChar;
}
}
cout<<inputString;
}
}
