Numbering Logic

Experts Im having a problem on how to formulate my logic.

Please pardon if I cant explain it well and let me show you an example of my problem.

Example I have 5 number:

shine

mary

mary

arenas

gilbert

john

john

the above names are my data then I want to give numberings of each data and it would look like this.

shine - 1

mary - 1

mary - 2

arenas-1

gilbert-1

john - 1

john - 2.

did you notice the pattern of my numbering?if the data changed i would number it as 1 if in the next loop it didnt change I would number it 2 and so fort.

Could you help me on my logic...those data are stored in one field inside in internal table then I put it in a loop.

Help me please on constructing my logic...

2

1

2