input (what you will type in the console) = 'Get   out'
lastChar = '\0'

In a while loop:
1 First time, c = 'G'. Is c a space? nope, is lastChar a space? nope, ok then just print 'G'
2 Second time, c = 'e'. Is c a space? nope, is lastChar a space? nope, ok then just print 'e'
3 Third time, c = 't'. Is c a space? nope, is lastChar a space? nope, ok then just print 't'
4 Fourth time, c = ' '. Is c a space? Yes! is lastChar a space? nope, ok let me make lastChar = ' ' and print ' '
5 Fifth time, c = ' '. Is c a space? Yes! ok is lastChar a space? Yes! ok then let's not print anything
6 Sixth time, c = ' '. Is c a space? Yes! ok is lastChar a space? Yes! ok then let's not print anything
7 Seventh time, c = 'o'. Is c a space? nope, ok is lastChar a space? Yes! ok make lastChar = '\0' and print 'o'
8 Eight time, c = 'u'. Is c a space? nope, ok is lastChar a space? nope, ok then just print 'u'
9 Ninth time, c = 't'. Is c a space? nope, ok is lastChar a space? nope, ok then just print 't'
10 Tenth time, c = EOF. Welp while loop ends here....