's' (/s/ and /z/) and 'th' (Voiced and Unvoiced /th/)
'oo' (Hard /u/ and /oo/) and 'er' (/ur/ and /uh/)
'a' (/a/ and /ar/) and 'ew' (/oo/ and /ue/)
'ie' (/ee/ and /igh/) and 'u_e' (/oo/ and /ue/)
