a*
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaab
a*a+
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
a(bird|hand|chicken|lion)dance
abirddance
a(bird|hand|chicken|lion)dance
adance
a(bird|hand|chicken|lion)dance
aliondance
a(bird|hand|chicken|lion)dance
aliodance
a(bird|hand|chicken|lion)*dance
abirddance
a(bird|hand|chicken|lion)*dance
adance
a(bird|hand|chicken|lion)*dance
aliondance
a(bird|hand|chicken|lion)*dance
alionlionbirddance
a(bird|hand|chicken|lion)+dance
abirddance
a(bird|hand|chicken|lion)+dance
adance
a(bird|hand|chicken|lion)+dance
aliondance
a(bird|hand|chicken|lion)+dance
alionlionbirddance
c*d*a*b*c*d*aba*b*
aaaaaab
a*b*aba*b*
ab