#include <stdio.h>
#include <iostream>
#include <string>
#include <sstream>

using namespace std;

void drawChars(int size, char character){
    for(int j = 1; j <= size; ++j)
    {
        cout << character;
    }
}

// size from 2 to 20
void drawTriangle(int size){

    for(int i = 1; i <= size; ++i)
    {
        drawChars(i,'X');
        cout << "\n";
    }
}

// size from 2 to 20
void drawSquare(int size){
    drawChars(size, 'X');
    cout << "\n";

    for(int i = 2; i < size; ++i)
    {
        cout << 'X';
        for(int j = 2; j < size; ++j)
        {
            cout << ' ';
        }
        cout << 'X';

        cout << "\n";
    }

    drawChars(size, 'X');
    cout << "\n";
}

// size from 1 to 20
void drawPyramid(int size){
    for(int i = 2; i < size; ++i)
    {
    }
}

// size from 1 to 20
void drawChristmasTree(int size){
}

// size from 2 to 20
void drawFigureX(int size){
}

// size from 2 to 20
void drawFigureY(int size){
}

// size from 3 to 20
void drawFigureZ(int size){
}

// size from 2 to 20
void drawFigureW(int size){
}

bool isCommand(const string command,const char *mnemonic){
	return command==mnemonic;
}

int main(){
	string line;
	string command;
	int value;
	cout << "START" << endl;
	while(true){
//		cin.getline(line, MAXLINE);
		getline(cin,line);
		std::stringstream stream(line);
		stream >> command;
		if(line=="" || command[0]=='#')
		{
			// ignore empty line and comment
			continue;
		}

		// copy line on output with exclamation mark
		cout << "!" << line << endl;;

		// change to uppercase
		command[0]=toupper(command[0]);
		command[1]=toupper(command[1]);

		if(isCommand(command,"HA")){
			cout << "END OF EXECUTION" << endl;
			break;
		}

		// read next argument, one int value
		stream >> value;

		if(isCommand(command,"TR"))
		{
			drawTriangle(value);
			continue;
		}
		if(isCommand(command,"SQ"))
		{
			drawSquare(value);
			continue;
		}
		if(isCommand(command,"PY"))
		{
			drawPyramid(value);
			continue;
		}
		if(isCommand(command,"CT"))
		{
			drawChristmasTree(value);
			continue;
		}
		if(isCommand(command,"FX"))
		{
			drawFigureX(value);
			continue;
		}
		if(isCommand(command,"FY"))
		{
			drawFigureY(value);
			continue;
		}
		if(isCommand(command,"FZ"))
		{
			drawFigureZ(value);
			continue;
		}
		if(isCommand(command,"FW"))
		{
			drawFigureW(value);
			continue;
		}

		cout << "wrong argument in test: " << command << endl;
	}

}