class Ideone{
	char s(char a,char b){return(char)(64<a&a<91?96<b&b<123?b-32:b:64<b&b<91?b+32:b);}
	void c(char[]s){int x=0,y=s.length-1;for(char t;x<y;s[x]=s(t,s[y]),s[y]=s(s[y],t),x++,y--)t=s[x];}
	public static void main(String[] args){
		String[] testcases = new String[]{
			"Hello, Midnightas",
			".Q",
			"TEST",
			"test",
			"Test",
			".,..,,!@",
			"ABCDefgHijklMNOPqrsTuVWxyz",
			"AbCdEfGHIJKlmnop123"
		};
		for(int i=0;i<testcases.length;i++){
			char[] temp = testcases[i].toCharArray();
			new Ideone().c(temp);
			System.out.println(new String(temp));
		}
	}
}

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