list1 and list2 instr help

1:
list1
sarah
james
billy
don
==========================

list2
sarah-192.212.111.221
james-812.11.412.551
billy-882.1.21.443.121
don-831.444.124.153

===============================================================

when list1 items is selected then list2 item selected same item please help:eek::eek::eek::eek::eek::eek::p


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