The /j/ sound is spelled with <y>, <ew> in ewe and is heard in the letter name U. The /ʧ/ sound is spelled with <ch> or <c> in cello.
This is a contrast between a voiced palatal semivowel and a voiceless alveolar affricate. It only ocurs initially. It is not a problem.
The mean density value is 1.3%. The lists make 20 semantic distinctions, a loading of 50%.
ewe chew ewes chews ewes choose U chew U's chews U's choose use chews use choose uses chooses using choosing yap chap yapped chapped yapping chapping yaps chaps yard Chard yaw chaw yawed chawed yawing chawing yaws chaws yaw chore yaws chores year cheer yearn churn yearned churned yearning churning yearns churns yellow cello yellows cellos yes chess yoke choke yoked choked yokes chokes yoking choking yore chaw yore chore York chalk your chaw yours chaws your chore yours chores
John Higgins, Shaftesbury, December 2010.