Crack The Code: If ROSE is coded as 682; What is Code for Search

If ROSE is coded as 6821,

CHAIR is coded as 73456 and

PREACH is coded as 961473,

What will be the code for SEARCH?

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The First two letters are in ROSE

i.e SE = 21

The Next two letters can be found out from PREACH and CHAIR

i.e. AR = 46

Last 2 letters can be found from PREACH

i.e. CH = 73

So the code for SEARCH would be

SEARCH = 214673