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Proof step 1 from proof sortedchars-divided (conclusion)

⊦ sortedchars = " !#$%&()*+-" + "./0123456789:<=>?@" + "ABCDEFGHIJKLM" + "NOPQRSTUVWXYZ" + "[]^_abcdefghi" + "jklmnopqrs" + "tuvwxyz|~"

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
⊦ sortedchars = " !#$%&()*+-./0123456789:<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[]^_abcdefghijklmnopqrstuvwxyz|~"

Rule argument

Additional information

Used simplifier rules: assoc: ⊦ (str1 + str2) + str3 = str1 + str2 + str3; from specification string-append