def copy_acc
import bend-collections@1.0.0.0/src/containers/hash_table.bend as HashTableimport Base
90def copy_acc(s: String, ra: String, rb: String) -> String & String:
91 match s:
92 case SNil{}:
93 (rev_onto(ra, SNil{}), rev_onto(rb, SNil{}))
94 case SCon{Chr{+c}, t}:
95 copy_acc(t, SCon{Chr{c}, ra}, SCon{Chr{c}, rb})