I am trying to write a REGEX to test for a PANGRAM. I can do it the traditional way, but cannot seem to solve it for more than 90% of my tests with a regular expression. Input: string Output: true || false Test Results so far. 6/10 /([a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z, s]+)/i 6/10 /[a-z]{1}/i 6/10 /[a-z]/i 6/10 /[a-z]+/i 9/10 /a?b?c?d?e?f?g?h?i?j?k?l?m?n?o?p?q?r?s?t?u?v?w?x?y?z/i only failed against