# postive samples for data contains 1.e(E),
1' or 1.e(1)
abc or 2 1.e%2
1' or 2 1.E/1
1' or 2 1.e%1
1' or 2 1.E^1
1' or 2 1.e|1
1' or 2 1.e*1
1' or 2 1.e&1
1' or 2 1.e/id
a select char 10.2E(id 2.e)
1 or 1.e(1)