Select first letter in multiple words

I want to select the first letter in every word in a string statement.

example:

Input: 'Are you going to see the new ABC series season premiere tonight?'

Output: r y gng t s th nw BC srs ssn prmr tnght?

I'm using the following, how do I include the caps?

function output= remvow(x)
  vow='aeiou'
  for k = 1:5
    x(x == vow(k)) = [];
  end
  output=x

Answer 1

[Walter Roberson]

vow = 'AEIOUaeiou';
x(ismember(x, vow)) = [];

But this does not have anything to do with removing the first letter of every word. It also does not deal with the case where 'y' is acting as a vowel, or the more subtle cases where 'l', 'm', 'n', 'r', or 'w' act as vowels in English.