![[old] Three Words](https://js-static.checkio.org/media/logos/task/middle/three-words-disabled.png)

Let's teach the Robots to distinguish words and numbers.
You are given a string with words and numbers separated by whitespaces (one space). The words contains only letters. You should check if the string contains.... For example, the string "start 5 7 end" contains three words in succession.
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