1# test `fast' substitutions 2 3h 4s/a// 5p 6g 7s/a//g 8p 9g 10s/^a//p 11g 12s/^a//g 13p 14g 15s/not present//g 16p 17g 18s/^[a-z]//g 19p 20g 21s/a$// 22p 23g 24 25y/a/b/ 26h 27s/b// 28p 29g 30s/b//g 31p 32g 33s/^b//p 34g 35s/^b//g 36p 37g 38s/^[a-z]//g 39p 40g 41s/b$// 42p 43g 44 45 46 47