english: ( µ a , µ b and µ c ) are all in the same direction, i.e. µ a , µ b and µ c form either a decreasing or
non_english: ynn-ixeynn-ixaynn-ixiynn-ixoynn-ixdynn-ixhynn-ixnynn-ixrynn-ixsynn-ixtynn-ixuynn-ixyynn-ixcynn-ixfynn-ixgynn-ixlynn-ixjynn-ixmynn-ixwynn-ixbynn-ixvynn-ixkynn-ixxynn-ixpynn-ixqynn-ixz