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

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

args before: [["cdef","cdef","cdef"]]
args after: [["","",""]]
result: undefined

args before: [["abcdefnop","abcxyznop","abcmnop","abcdefnop"]]
args after: [["abcdef","abcxyz","abcm","abcdef"]]
result: undefined

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

args before: [["abcdef","abcdef","abcmnopdef","abcdef","abcxyzdef","abcmnopdef"]]
args after: [["abc","abc","abcmnop","abc","abcxyz","abcmnop"]]
result: undefined

args before: [["abcdef_","abcxyz_","abcmnop_","abcdef_","abcxyz_","abcmnop_","dabcdef_"]]
args after: [["abcdef","abcxyz","abcmnop","abcdef","abcxyz","abcmnop","dabcdef"]]
result: undefined

args before: [["abcdef_","abcxyz_","abcmnop_","abcdef_","abcxyz","abcmnop_","dabcdef_"]]
[args were not changed]
result: undefined