Show how end-around carry can be used for addition in one's-complement. What is the max propagation length?

Analyze the show how end-around carry can be used for addition in one's-complement. what is the max propagation length?.

Examples
Input: "test_input_1"
Output: "output_1"
Hints

Show how end-around carry can be used for addition in one's-complement. What is the max propagation length?

Analyze the show how end-around carry can be used for addition in one's-complement. what is the max propagation length?.