[ˈtʃɪkn̩] | chicken | |
[ˈnetʃɹ̩] | nature | |
[wɪtʃ] | which |
The symbol [tʃ] appears to be an exception to the "one sound = one symbol" principle. We'll see later how it isn't really an exception. (For now, you can think of [tʃ] as a fancy single symbol that just happens to have a gap in the middle.)