const latinDataReplace = (firstName, lastName) => {
    const maxGeneralLength = 25;

    const step1 = ({firstName, lastName}) => {
        if (firstName.length + lastName.length > maxGeneralLength) {
            firstName = firstName[0]
        }
        return {firstName, lastName};
    };

    const step2 = ({firstName, lastName}) => {
        if (lastName.indexOf('-') && (firstName.length + lastName.length) > maxGeneralLength) {
            lastName = lastName.slice(0, lastName.indexOf('-'));
        }
        return {firstName, lastName};
    };

    const step3 = ({firstName, lastName}) => {
        console.log({firstName, lastName}, 'step3');
        if (firstName.length + lastName.length > maxGeneralLength) {
            lastName = lastName.slice(0, maxGeneralLength - 1);
        }
        return {firstName, lastName};
    };

    const {latinFirstName, latinLastName} = Promise.resolve({firstName, lastName})
        .then(step1)
        .then(step2)
        .then(step3);
    return {latinFirstName, latinLastName};
};

const {latinFirstName, latinLastName} = latinDataReplace('', 'CHARNYSHEVICH-ALIAKSANDROVA');
console.log({latinFirstName, latinLastName}, 'result');