Write Names to File and Read Back

HARDFile Handling

Read 3 names from the user (one per line). Write each name to a file called output.txt, one name per line. Then close the file, reopen it for reading, and output each name in UPPERCASE.

Input: 3 names on separate lines. Output: The 3 names in uppercase, one per line.

Example:

Input:  alice
        bob
        charlie
Output: ALICE
        BOB
        CHARLIE

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Sample Test Cases

Test 1: Lowercase → uppercase

Inputs: alice, bob, charlie

Expected: ALICE BOB CHARLIE

Test 2: Mixed case → uppercase

Inputs: XENA, Yuki, zara

Expected: XENA YUKI ZARA

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