trigger
start 1
end 1
start 2
end 2
start 3
end 3
start 4
end 4
start 5
end 5
start 6
end 6
start 7
end 7
start 8
end 8
start 9
end 9
start 10
end 10
start 11
end 11
start 12
end 12
start 13
end 13
start 14
end 14
start 15
end 15
start 16
end 16
start 17
end 17
start 18
end 18
start 19
end 19
start 20
end 20
start 21
end 21
start 22
end 22
start 23
end 23
start 24
end 24