function manipulator(arr, input) {
    let arrToPrint = arr.slice();

    for (let i = 0; i < input.length; i++) {
        let command = input[i].split(' ');
        let action = command[0];

        if (action === 'add') {
            let ind = Number(command[1]);
            let el = Number(command[2]);

            addCommand(ind, el);
        }
        else if (action === 'addMany') {
            let ind = Number(command[1]);

            for (let i = command.length - 1; i >= 2; i--) {
                let element = Number(command[i]);
                arrToPrint.splice(ind,0,element);
            }
        }
        else if (action === 'contains') {
            let el = Number(command[1]);

            isContain(el);
        }
        else if (action === 'remove') {
            let ind = Number(command[1]);

            arrToPrint.splice(ind, 1);
        }
        else if (action === 'shift') {
            let positions = Number(command[1]);

            while (positions > 0) {
                arrToPrint.push(arrToPrint.shift());
                positions--;
            }
        }
        else if (action === 'sumPairs') {
            let testArr = arrToPrint.slice();
                arrToPrint = [];
            while (testArr.length > 1) {
                let num = testArr.shift() + testArr.shift();
                arrToPrint.push(num);
            }
            if (testArr.length === 1) {
                arrToPrint.push(testArr.shift());
            }
        }
        else if (action === 'print') {
            console.log(`[ ${arrToPrint.join(', ')} ]`);
            break;
        }
    }

    function isContain(num) {
        if (arrToPrint.indexOf(num) !== -1) {
            console.log(arrToPrint.indexOf(num));
        }
        else {
            console.log(-1);
        }
    }

    function addCommand(index, element) {
        arrToPrint.splice(index, 0, element);
    }


}