Ihave a list = ['a',3,4,'b',6,'c',5,1] how i can convert it in a list = ['a',34,'b',6,'c',51]? : I have a list input as `list = ['a',3,4,'b',6,'c',5,1]` and I want to my output list as `list = ['a',34,'b',6,'c',51]`.