args before: [[]]
[args were not changed]
result: []

args before: [["cdef","abcxyz","abcmnop"]]
[args were not changed]
result: ["cdef","abcxyz","abcmnop"]

args before: [["cdef","cdef","cdef"]]
[args were not changed]
result: ["","",""]

args before: [["abcdefnop","abcxyznop","abcmnop","abcdefnop"]]
[args were not changed]
result: ["abcdef","abcxyz","abcm","abcdef"]

args before: [["abcdef","abcxyz","aabcmnop","abcdef","abcxyz"]]
[args were not changed]
result: ["abcdef","abcxyz","aabcmnop","abcdef","abcxyz"]

args before: [["abcdef","abcxyzf","abcmnopf","abcdef","abcxyzf","abcmnopf"]]
[args were not changed]
result: ["abcde","abcxyz","abcmnop","abcde","abcxyz","abcmnop"]

args before: [["abcdef","abcxyz","abcmnop","abcdef","abcxyz","abcmnop","dabcdef"]]
[args were not changed]
result: ["abcdef","abcxyz","abcmnop","abcdef","abcxyz","abcmnop","dabcdef"]

args before: [["abcdef"]]
[args were not changed]
result: ["abcdef"]