7. A new batch of wizards are about to arrive at Neudesic School of Witchcraft and Wizardry. The first year students are required to buy wands before starting their first term. Students need to visit Ollivanders Wand Shop to purchase wands. Mr. Ollivander however is under a weird spell and opens the shop at weird times everyday and keeps the shop open for a very specific duration of time. Could you help first year wizards calculate the closing time of Ollivanders Wand Shop so that can get their wands before the shop closes? Wizards follow 24 hour format. Given T test cases and for each test case given two input parameters - 1. The opening time in hh mm format separated by space 2. The duration of time the shop is open for in hh mm format separated by space Calculate and print the closing time in hh mm

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