answer: Lean tells Alike that English is difficult because one letter can have several
  pronunciations and one word can have several meanings.
documents: #Person1#: Hi, my name is Lean, and I'm from Russia.
  #Person2#: Nice to meet you, Lean. My name is Alike. I'm from Japan.
  #Person1#: To me English is a difficult language.
  #Person2#: A second language is always difficult.
  #Person1#: True, but English is harder than most. It's a crazy language.
  #Person2#: A crazy language? Why do you say that?
  #Person1#: One letter can have several pronunciations and one word can have several meanings.
  #Person2#: No wonder you say English is a crazy language.