Python 2.7.12- How to have the same length for a new string as well as letters? : <p>I've just started learning Python 2.7.12 and in my first homework I was given a string called str2, and I'm supposed to create another string which will be the same length as the previous one. In addition,I need to check the third letter (if it's an Upper I need to convert to lower and the opposite, as well as if it's not a letter, I need to change it with '%').
The other characters of the first string should be copied to the second one.</p>

<p>We were given just the basic commends and nothing else so I can't really solve it. please help me! :)</p>
