Complete the rules.

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Дополни правила.

To make nouns plural we*…*

add ending [-s|-'s|-ed];

add ending [-s|-es|-os] after  -s, -ss, -sh, -ch, -x, -o;

change -y into [-ae|-ie|-yie] if it comes after a consonant and then add ending -s;

don't change -y if it  comes after a vowel and then add ending -s;

change -f and -fe into [-voes|-ves|-fes].