How to lead zero with single month and day return?

Question is now on brief

Suppose Cell A1 contains 42 Years, 2 Months, 3 Days, how do I tell excel to return 42 Years, 02 Months, 03 Days in Cell A2. Similarly for the following inputs :

15 Years, 6 Months, 13 Days : 15 Years, 06 Months, 13 Days
21 Years, 11 Months, 5 Days : 21 Years, 11 Months, 05 Days
52 Years, 10 Months, 12 Days : 52 Years, 10 Months, 12 Days

The output should contain length of 28 characters.

Excel file attachment is available

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example.xlsx10.61 KB

re your Excel formula question

Hi, could you send me the file so I can see if all entries are similar to the ones you posted