30 Coins (30 Monedas)

NAZCA, PERU

30 COINS

SEGOVIA, SPAIN

Fifty percent of the four-digit keys,

are based on 13 combination structures,

eighty percent of which include a capital letter, a small letter and a digit.

Okay, alright. F--

For ease, the letters chosen have a high degree of the letters

A, B, C, D,

combined with the numbers one, two, three and four,

so if we keep to the combinatorics of these elements we have a list