```ruby
include DittoCode::Exec

print "I'm pro" if DittoCode::Exec.is 'PRO'
print "I'm pro or free" if DittoCode::Exec.is 'PRO,FREE'
print "I'm premium" if DittoCode::Exec.is 'PREMIUM'
print "I'm not premium" unless DittoCode::Exec.is 'PREMIUM'
print "I'm not premium nor pro" unless DittoCode::Exec.is 'PREMIUM,PRO'
```

Change the include into the spec_helper
user
```ruby
print "I'm pro" if DittoCode::Exec.is 'PRO'
print "I'm pro or free" if DittoCode::Exec.is 'PRO,FREE'
print "I'm premium" if DittoCode::Exec.is 'PREMIUM'
print "I'm not premium" unless DittoCode::Exec.is 'PREMIUM'
print "I'm not premium nor pro" unless DittoCode::Exec.is 'PREMIUM,PRO'
```
assistant