Electronic message

let string = gets()
string = string.slice(0, -1);
string = string.split(' ');
let substringsWithoutLetters = [];
let substringWithoutNumbers = []
let substringWithoutSpaces = [];
let lengthsArray = [];

for (let i = 0; i < string.length; i++) {
    substringsWithoutLetters.push(string[i].replace(/[A-Za-z]/g, ''));
    substringWithoutNumbers.push(substringsWithoutLetters[i].replace(/\d/g, ''));
    lengthsArray.push(substringWithoutNumbers[i].length)
}
print(Math.max(...lengthsArray))