function solve(arr, arr2) {


    let arr2Length = arr2.length;

    let arr3 = [];


    for (let i = 0; i < arr2Length; i++) {


        if (arr3.length > 0) {

            arr = arr3;

            arr3 = [];

        }


        let current = arr2[i].split(' ');

            switch (current[0]) {

                case 'add':

                arr.splice(Number(current[1]), 0, Number(current[2]));

                break;

                case 'addMany':

                let index = Number(current[1]);

                for (let j = 2; j < current.length; j++) {

                arr.splice(index, 0, Number(current[j]));

                index++;

                }

                break;

                case 'contains':

               console.log(arr.indexOf(Number(current[1])));

                break;

                case 'remove':

                arr.splice(Number(current[1]), 1);

                break;

                case 'shift':

                for (let j = 0; j < Number(current[1]); j++) {

                   arr.push(arr.shift());

                }

                break;

                case 'sumPairs':

                for (let j = 0; j < arr.length; j += 2) {

                    if (!Number(arr[j + 1])) {

                        arr3.push(arr[j]);

                        break;

                    }

                    arr3.push(arr[j] + arr[j + 1]);

                }

                break;

                case 'print':

                if (arr3.length > 0) {

                    arr = arr3;

                }

                console.log(`[ ${arr.join(', ')} ]`);

                break;

            }





    }



//    console.log(arr.length);


}