#include <stdio.h>
void main() {
	int op;
	char ch;
	printf("1. Lower to Upper\n2. Upper to Lower\n");
	printf("Option: ");
	scanf("%d", &op);
	printf("Character: \n");
	scanf("%c",&ch);
	switch(op){
		case 1:
	if(ch>= 'a' && ch<='z'){
		printf("Upper: %c\n",ch);
	}else{
		printf("Not lower\n");
	}
		break;
		case 2:
		if(ch>= 'A' && ch<='Z'){
			printf("Lower: %c\n",ch+32);
		}else{
			printf("Not Upper\n");
		}
		break;
		default:
		printf("Invalid\n");
		break;
	}
 
 
}

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