/*
In a factory a printer prints labels for boxes. For one kind of boxes
the printer has to use colors which, for the sake of simplicity,
are named with letters from a to m.
*/
const printerError = s => {
let ratio = 0
s.split("")
.forEach(letter => (letter.charCodeAt(0) & 31) > 13 ? ratio+=1: null)
return `${ratio}/${s.length}`
}
// With love @kouqhar