Interprete a UUID

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UUID: 
Your input:                      21f55c86-82d9-4a57-931e-4043c7e603d1

Various notations:

URN:                             urn:uuid:21f55c86-82d9-4a57-931e-4043c7e603d1
URI:                             uuid:21f55c86-82d9-4a57-931e-4043c7e603d1
Microsoft GUID syntax:           {21F55C86-82D9-4A57-931E-4043C7E603D1}
C++ struct syntax:               { 0x21f55c86, 0x82d9, 0x4a57, { 0x93, 0x1e, 0x40, 0x43, 0xc7, 0xe6, 0x03, 0xd1 } }

As OID (ISO/ITU-T 128 bits):     2.25.45138513229996308690134526736264987601
As OID (Microsoft):              1.2.840.113556.1.8000.2554.8693.23686.33497.19031.37662.4211655.15074257
As OID (Waterjuice 2x64 bits):   1.3.6.1.4.1.54392.1.2446963705336384087.10600981232737453009
As OID (Waterjuice 4x32 bits):   1.3.6.1.4.1.54392.2.569728134.2195278423.2468233283.3353740241
As OID (Waterjuice 8x16 bits):   1.3.6.1.4.1.54392.3.8693.23686.33497.19031.37662.16451.51174.977

Interpretation of the UUID:

Variant:                         [0b10_] RFC 4122 (Leach-Mealling-Salz)
Version:                         [0x4] Random
Random bits:                     00100001 11110101 01011100 10000110 10000010 11011001 ????1010 01010111
                                 ??010011 00011110 01000000 01000011 11000111 11100110 00000011 11010001
Random bytes:                    [0x21f55c8682d9?a57?31e4043c7e603d1]