Longest Word in a 7 Segment Display

Given a list of words, return the longest word which can fit on a 7 segment display.

• Letters which do not fit on a 7 segment display are k, m, v, w and x.
• Therefore, do not count words which include these letters.

Examples

longest_7segment_word(["knighthood", "parental", "fridge", "clingfilm"]) ➞ "parental"

longest_7segment_word(["coding", "crackers", "innokodakademija", "celebration"]) ➞ "celebration"

longest_7segment_word(["velocity", "mackerel", "woven", "kingsmen"]) ➞ ""

Notes

• All words will be given in lowercase.
• Return an empty string if no words are eligible (see example #3).
• If multiple valid words have the same length, return the first word that appears.