Obverse: Print with a fixed-width font, such as Lucida Console,
and cut out.

╔════════════╦═════════════╦═════════════════════════════════╗
║     U+0000 ║ W  X  Y  Z  ║ Otto’s Magic Pocket Encoder     ║
║     U+D7FF ║ !  !  !  !  ║ for UTF-16  ╔═══════════════════╣
║       WXYZ ║ _  _  _  _  ║             ║    V>vv │    V>vv ║
╟────────────╫─────────────╢ Version 1.1 ║    U>uu │    U>uu ║
║     U+E000 ║ W  X  Y  Z  ║ ©2004-07-05 ║ tt<T    │ tt<T    ║
║     U+FFFF ║ !  !  !  !  ║             ║    _<__ │    _<__ ║
║       WXYZ ║ _  _  _  _  ║             ║ ────────┼──────── ║
╟────────────╫─────────────╚═════════════╣    0=00 │ 13<8=20 ║
║ U-00010000 ║ 31 2t tu uv │ 31 3v Y  Z  ║ 00<1=01 │ 20<9=21 ║
║ U-000FFFFF ║ !  2_ __ __ │ !  3_ !  !  ║ 01<2=02 │ 21<A=22 ║
║      TUVYZ ║ D  _  _  _  │ D  _  _  _  ║ 02<3=03 │ 22<B=23 ║
╟────────────╫─────────────┼─────────────╢ 03<4=10 │ 23<C=30 ║
║ U-00100000 ║ 31 23 3u uv │ 31 3v Y  Z  ║ 10<5=11 │ 30<D=31 ║
║ U-0010FFFF ║ !  !  3_ __ │ !  3_ !  !  ║ 11<6=12 │ 31<E=32 ║
║       UVYZ ║ D  B  _  _  │ D  _  _  _  ║ 12<7=13 │ 32<F=33 ║
╚════════════╩═════════════╧═════════════╩═══════════════════╝


....:....1....:....2....:....3....:....4....:....5....:....6..


Reverse: Cut out and paste on back of obverse.

╔════════════════════════════════════════════════════════════╗
║     Otto’s Magic Pocket Encoder for UTF-16 Version 1.1     ║
║     User’s Manual     (inspired from Cima’s UTF-8 MPE)     ║
╠════════════════════════════════════════════════════════════╣
║• Left column: min and max Unicode scalar values: pick the  ║
║  row that applies to the code point to be converted.       ║
║  T…Z mark the hexadecadic digits that have to be processed.║
║• Central column: work area to compute UTF-16BE code units. ║
║• Right column: hexadecadic to quaternary conversion tables:║
║  < for T to tt; = for U/V to uu/vv (step 1) and for step 2.║
║1. Convert each digit marked by T…V from hex to quat. Write ║
║   quat digits on the underscores placed under letters t…v. ║
║2. Convert 2-digit quat numbers to hex digits or copy digits║
║   W…Z, as indicated, and write them on the underscores on  ║
║   the next line. That’s your UTF-16BE sequence in hex.     ║
║! Exclamation marks indicate shortcuts.                     ║
╚════════════════════════════════════════════════════════════╝

Enjoy.