20
BBBAABABBA
ADD ABBABABABBBB
QUERY BABABAABBA
QUERY AABABBBAAB
QUERY BABABBABAABBBB
ADD BABAAAAAABABB
ADD BABABBBBABBAAA
ADD BBBAABABAA
QUERY BBBBAAA
ADD BBBAAABBBA
QUERY BABBBBA
QUERY BABABBAAB
ADD BBBBBBBBB
ADD BAABAAB
ADD BAAAAAB
QUERY ABBBBBB
ADD ABBBAAA
QUERY ABABBBAABBABA
QUERY ABAAAABBABBB
ADD AAAAABAAAAA
QUERY ABBAABBBBBB