function solve(input) {


    let intervalBegg = input[0];

    let intervalEnd = input[1];

    let exceptionLetter = input[2];

    let result1 = '';

    let result2 = '';

    let result3 = '';

    let resultFinal = '';

    let counter = 0;




    for (let i = intervalBegg.charCodeAt(0) - 97; i <= intervalEnd.charCodeAt(0) - 97; i++) {




        if (String.fromCharCode(97 + i) !== exceptionLetter) {

            result1 = String.fromCharCode(97 + i);


            for (let j = intervalBegg.charCodeAt(0) - 97; j <= intervalEnd.charCodeAt(0) - 97; j++) {

                if (String.fromCharCode(97 + j) !== exceptionLetter) {

                    result2 = String.fromCharCode(97 + j);


                    for (let k = intervalBegg.charCodeAt(0) - 97; k <= intervalEnd.charCodeAt(0) - 97; k++) {

                        if (String.fromCharCode(97 + k) !== exceptionLetter) {

                            result3 = String.fromCharCode(97 + k);


                            counter += 1;

                            resultFinal += `${result1}${result2}${result3} `;



                        }





                    }


                }





            }




        }








    }



    console.log(`${resultFinal}${counter}`);


}

solve([

    'a',
    'c',
    'b'


]);