Complete Alphabet Checker

Given a string, verify whether it contains all letters of the English alphabet at least once. The check is case-insensitive, meaning that both uppercase and lowercase letters are treated equally. Formally, for a string \( S \), determine if it contains every letter in the set \( \{a, b, c, \dots, z\} \) at least once. The string can include letters, numbers, symbols, and spaces.

inputFormat

The input consists of a single line representing the string to be checked. This string may be empty or include spaces, symbols, and other characters.

outputFormat

Output a single line containing True if the string contains every letter from 'a' to 'z' (ignoring case), otherwise output False.

The quick brown fox jumps over a lazy dog.

True