asterisk users - Oct 2004 - gotoif regex?

I have a test for all tool free numbers.

This works but would using regex in one statement be more efficient?

exten => s,4,GotoIf($["${CALLERIDNUM:0:3}" =
"888"]?s|108)
exten => s,5,GotoIf($["${CALLERIDNUM:0:3}" =
"877"]?s|108)
exten => s,6,GotoIf($["${CALLERIDNUM:0:3}" =
"866"]?s|108)
exten => s,7,GotoIf($["${CALLERIDNUM:0:3}" =
"800"]?s|108)

Would this be the proper syntax?

exten => s,4,GotoIf($[${CALLERIDNUM:0:3} : 888|877|866|800]?s|108)

I tried this but I'm not sure it works.

Thanks

--John