Initials of a phrase

Problem

Write a function that takes a phrase and returns the first letter of each word, in capitals and all glued together: with "code a little every day" it returns "CALED". The words come separated by spaces, and extra spaces are ignored. An empty phrase returns the empty text.

Examples

• "code a little every day" → "CALED"

• "Hello world" → "HW"

• "" → ""

Besides these, the challenge has hidden tests that are revealed when you submit your solution.

You start with this

def phrase_initials(text):
    pass

function phraseInitials(text) {
}