Matching Multiple repeating values in one column with another

[stevebbbb]

Matching Multiple repeating values in one column with another.

I have a three columns of data that I need to map the requird Ids in Col A against multiple repeats in Col C. AS per data below

ID req Ids Repeating values
REQ123 12234 12234
REQ124 12235 12234
REQ125 12236 12234
REQ126 12237 12234
REQ127 12238 12234
REQ128 12239 12234
REQ129 12240 12234
REQ130 12241 12234
REQ131 12242 12234
REQ132 12243 12235
REQ133 12244 12235
REQ134 12245 12235
REQ135 12246 12235
REQ136 12247 12235
REQ137 12248 12235
REQ138 12249 12235
REQ139 12250 12235
REQ140 12251 12235
REQ141 12252 12236
REQ142 12253 12236
REQ143 12254 12236
REQ144 12255 12236
REQ145 12256 12236
REQ146 12257 12236
REQ147 12258 12236
....................12237
....................12237
....................12237
....................12237
....................12237
....................12237
....................12237
....................12237
....................12237


Any ideas how I can do this?

Thanks

steve