https://test.estudiocontext.com/courses/5-day-pronunciation-challenge/lessons/1-1-welcome/2025-09-05T20:08:43+00:00https://test.estudiocontext.com/courses/5-day-pronunciation-challenge/lessons/1-2-introduction-to-the-problem-silent-letters/2025-09-05T20:11:03+00:00https://test.estudiocontext.com/courses/5-day-pronunciation-challenge/lessons/1-3-examples/2025-09-05T21:11:00+00:00https://test.estudiocontext.com/courses/5-day-pronunciation-challenge/lessons/1-5-summary/2025-09-05T20:18:28+00:00