---------------------------- Test N1 ------------------------------
1:abc
2:def
1-abc
2:def
---------------------------- Test N2 ------------------------------
1:abc
def
2:ghi
jkl
1-abc
def
2:ghi
jkl
---------------------------- Test N3 ------------------------------
2:def
3:
ghi
jkl
---------------------------- Test N4 ------------------------------
2:ghi
jkl
---------------------------- Test N5 ------------------------------
1:abc
2:def
3:ghi
4:jkl
1-abc
2:def
---------------------------- Test N6 ------------------------------
1:abc
2:def
3:ghi
4:jkl
3-ghi
4:jkl
---------------------------- Test N7 ------------------------------
2:abc@3:def@1-xyz@2:abc@3:def@