adding pairwise implementation
adding pairwise implementation

ValdiJr/testing-cin,damorim/testing-cin,victorfsf/testing-cin,ValdiJr/testing-cin,chrystianjss/testing-cin,chrystianjss/testing-cin,damorim/testing-cin,ValdiJr/testing-cin,ValdiJr/testing-cin,damorim/testing-cin,ValdiJr/testing-cin,damorim/testing-cin,chrystianjss/testing-cin,damorim/testing-cin,victorfsf/testing-cin,damorim/testing-cin,damorim/testing-cin,ValdiJr/testing-cin,victorfsf/testing-cin