Thinking of operations on collections to replace iteration is
productive, but alas, I'm new to it. I'm looking for a way to count
the number of occurrences of each and every character in str1 that
occurs in str2, so that

(count-all "abc" "abracadabra")

will give

8

which is the count of characters in  "abacaaba".

Any suggestion? Thanks!
Tuba

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