'So', here we 'go' for something 'to' 'do' ;-)

We read 'cow' as 'k - au' and 'bow' as 'b oe'. How do we read 'sow' and 'tow'?

I heard on the news: 'a farmer lost 30 thousand pigs (in the flood)' then I read the news: ' a farmer lost 30 sows and pigs (in the flood)' ;-)