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#<stdlib.rip> 0 0I[empty string] 'a <strpush> 'b <strpush> ' <strpush> '4 <strpush> '2 <strpush> 9i <strpush> 0 'a <strpush> 'b <strpush> 'c <strpush> 'd <strpush> 'e <strpush> 'f <strpush> 9i <strpush> <strcat> <strprint> 'a 'b 'c 'd 'x 'y 'z 9i 8 <mkstr> <strprint>