package main
import ( "fmt"
"regexp"
)
func main(){
// your code goes here
test := `(?i)\b(co.)(?:\s|$)`
re := regexp.MustCompile(test)
matches := re.FindAllStringSubmatch("co. is a secret shortcut ", -1)
for _, match := range matches {
fmt.Printf("'%s'", match[1])
}
}
cGFja2FnZSBtYWluCmltcG9ydCAoICJmbXQiCiAgICAgICAgInJlZ2V4cCIKICAgICAgICApCgpmdW5jIG1haW4oKXsKCS8vIHlvdXIgY29kZSBnb2VzIGhlcmUKCXRlc3QgOj0gYCg/aSlcYihjby4pKD86XHN8JClgCglyZSA6PSByZWdleHAuTXVzdENvbXBpbGUodGVzdCkKCW1hdGNoZXMgOj0gcmUuRmluZEFsbFN0cmluZ1N1Ym1hdGNoKCJjby4gaXMgYSBzZWNyZXQgc2hvcnRjdXQgIiwgLTEpCglmb3IgXywgbWF0Y2ggOj0gcmFuZ2UgbWF0Y2hlcyB7CgkJZm10LlByaW50ZigiJyVzJyIsIG1hdGNoWzFdKQoJfQp9