But this number does not meet the requirements of "5-5 remainder 3". If you want to meet this requirement under the first condition, you must add a multiple of 7 to 1 1 until you meet the requirement of "5-5 remainder 3":

1 1+7= 18, which is consistent!

Verify that 18 meets the following requirements: "Three threes just add up".

Answer: 18