Given a pattern and a string s, find if s follows the same pattern.
Here follow means a full match, such that there is a bijection between a letter in pattern and a non-empty word in s. Specifically:
pattern maps to exactly one unique word in s.s maps to exactly one letter in pattern.
Example 1:
Input: pattern = "abba", s = "dog cat cat dog"
Output: true
Explanation:
The bijection can be established as:
'a' maps to "dog".'b' maps to "cat".Example 2:
Input: pattern = "abba", s = "dog cat cat fish"
Output: false
Example 3:
Input: pattern = "aaaa", s = "dog cat cat dog"
Output: false
Constraints:
1 <= pattern.length <= 300pattern contains only lower-case English letters.1 <= s.length <= 3000s contains only lowercase English letters and spaces ' '.s does not contain any leading or trailing spaces.s are separated by a single space.