Chars  ← {+@a⇡26 +@A⇡26 "012356789" "!\"#$%&'()*+,-./:;<=>?@[]^_{|}~"}
All    ← /◇⊂ Chars
Choose ← ⊡⌊×⚂⊸⧻
Base   ← (≡◇Choose Chars) # Satisfy rule
Pw     ← ⊂Base⨬(""|⍥(Choose All)-4)⊸>4
Len    ← 20
Count  ← 10
⍥(Pw Len)Count