A pangram
Task
A pangram is a sentence that contains every letter of the English alphabet from a to z. The program reads a sentence and prints True if it is a pangram, otherwise False.
Upper and lower case count as the same letter; other characters (spaces, punctuation, digits) are ignored.
Examples
Input
The quick brown fox jumps over the lazy dog
Expected output
True
Input
Hello world
Expected output
False
After you submit, 4 hidden tests will also check your solution: the whole alphabet, one letter missing, with punctuation, an empty sentence.
Python starts the first time you run code.
Ctrl+Enter runs the program. Tab indents. Press Esc, then Tab, to leave the editor.
Input (stdin)
Each line = one call to input().
Output
Hints
Try it yourself first. Each hint reveals a little more - and lowers the reward a little.
Signed out, hints are free - but no XP is awarded either.
Solution
The solution unlocks after the last hint.