19501:/a..b/sO
19502:/a..bc/sO
19503:/ab..c/sO
19504:/ab..c../sO
19505:/ab..c../siO
19506:/.ab..c../siO
19507:/abcdefgh....abcd....efgh/sO
19508:/foo..ba/sO
19509:/foo..ba\z/sO

# Longer masks
19510:/[a-f]{3}-[a-f]{3}-[a-f]{4}/

# Mixed-sensitivity literals can use masks.
19511:/ab(?i)cdef(?-i)ghi/

# Fixed width pattern that's too long to use a benefits mask.
19512:/a{10}b{10}[Cc]{10}d{10}/

# Mixed sensitivity and dot mask
19513:/f[Yy][mPiU].W/

# Short mixed-case literals to stress literal matchers
19514:/(?i)godzill(?-i)a/
19515:/g(?i)odzilla/
19516:/G(?i)odzilla/
19517:/(?i)god(?-i)z(?i)illa/
19518:/g(?i)od(?-i)z(?i)illa/

# Masks and mixed-case
19519:/^nqt(?-i)qkf{14}bdr+k.t(?i)r[cp]q{3}\z/is

# More mixed-case
19520:/[Bb][Cc][Aa][CDc]abaaEbcd/