7번

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

int main() {
	char arr[100] = {0};
	cin.getline(arr, 100, '\n');
	for (int i = 0; i < strlen(arr); i++)
	{
		if (arr[i] >= 65 && arr[i] <= 90)
		{
			arr[i] = arr[i] + 32;
		}
	}
	for (int i = 0; i < strlen(arr); i++)
	{
		if (arr[i] != ' ')
		{
			cout << arr[i];
		}
		
	}
}