Confirmation that spaces are really spaces

[oshfdk]

Out of curiosity, if you test a very simple rule that q always starts a word, n always ends a word and y ends a word unless this will create a single character word (.y.), what proportion of spaces would be correctly recovered? Just looking at the text it appears as if more than 50% of spaces can be explained by certain characters requiring a space before them, certain characters a space after them or, in the case of y, either before or after.