The sentence itself is simple, but the exercise feels more difficult because the earlier Basics exercises mostly cover learning the letters in isolation and then we're pretty soon thrown into these exercises where we have to combining multiple letters together into words and sentences. There needs to be more exercises first which focuses on combining letters into words, before we are exposed to these exercises
I agree with Wesley: why after the letter classes we directly jump into sentences? It would be more helpful if we can learn the words that uses the specific letter in the early lesson. For example in level 1, we learned एक, but nothing else similar in the following levels for letters.