Query regarding BMS winpin code format

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My friend got 2 winpin codes for BMS offer from his bank.One of the code is in usual 16 digits format but other one is 11 character alphanumeric.Is there something else need to be done to convert this alphanumeric code to usual 16 digit format or is this format also valid?

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1 Dimer
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BMS customer care confirmed 11 character alphanumeric code is also valid.

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