Passwords - A Bad Mnemonic System

Guess we have a pin number: 3401, this number is coded in the following scheme with a word, let's say c-r-a-p.

 ___0______1______2______3______4______5______6______7______8______9__
|      |      |      |      |      |      |      |      |      |      |
|      |      |      |  C   |      |      |      |      |      |      |
|______|______|______|______|______|______|______|______|______|______|
|      |      |      |      |      |      |      |      |      |      |
|      |      |      |      |  R   |      |      |      |      |      |
|______|______|______|______|______|______|______|______|______|______|
|      |      |      |      |      |      |      |      |      |      |
|  A   |      |      |      |      |      |      |      |      |      |
|______|______|______|______|______|______|______|______|______|______|
|      |      |      |      |      |      |      |      |      |      |
|      |  P   |      |      |      |      |      |      |      |      |
|______|______|______|______|______|______|______|______|______|______|

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