test 1: size:[10], src:[ ips], dest:[Lorem], result:[9], dest:[Lorem ips]
test 2: size:[10], src:[ ipsu], dest:[Lorem], result:[10], dest:[Lorem ips]
test 3: size:[5], src:[XXXXXXXX], dest:[Lorem ip], result:[13], dest:[Lorem ip]
test 4: size:[0], src:[XXXXXXXX], dest:[Lorem ip], result:[8], dest:[Lorem ip]