#include <stdio.h>
#include <ctype.h>
 
int main() {
    char firstName[50];
    char lastName[50];
    int i = 0;
 
    printf("Enter your first name: ");
    scanf("%s", firstName);
 
    printf("Enter your last name: ");
    scanf("%s", lastName);
 
    printf("First name (uppercase): ");
    while (firstName[i] != '\0') {
        printf("%c", toupper(firstName[i]));
        i++;
    }
    printf("\n");
 
    i = 0; 
    printf("Last name (lowercase): ");
    while (lastName[i] != '\0') {
        printf("%c", tolower(lastName[i]));
        i++;
    }
    printf("\n");
 
    return 0;
}

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IFVtYXIKQmlsYWw=

 Umar
Bilal