task1=abc
task2=123
task3=.*\.$
task4=^[cmf]an$
task5=^[^b]og$
task6=^[A-Z][a-z][a-c]$
task7=^waz{3,6}up$
task8=^a+[bc]*c+$
task9=^\d+ files? found\?$
task10=^\d+\.\s+.+$
task11=^Mission: successful$
task12=^(.+)\.pdf$
task13=^([A-Za-z]{3} (\d{4}))$
task14=^(\d+)x(\d+)$
task15=^I love (cats|dogs)$
task16=^.+$