function solve(integers, commands) {
    let currentCommand = commands.shift();
    function add(arr, tokens){
        arr.splice(tokens[0], 0, tokens[1]);
        return arr;
    }
    function addMany(arr, tokens){
        let index = tokens.shift();
        for(let value of tokens){
            arr.splice(index++, 0, value);
        }
        return arr;
    }
    function remove(arr, tokens){
        arr.splice(Number(tokens[0]), 1);
        return arr;
    }
    function shift(arr, tokens){
        for (let i = 0; i < Number(tokens[0]); i++) {
            let element = arr.shift();
            arr.push(element);

        }
        return arr;
    }
    function sumPairs(arr){
        let output = [];
        for (let i = 0; i < arr.length; i=+2) {
            let a = arr[i] || 0;
            let b = arr[i + 1] || 0;
            output.push(a + b);

        }
        return output;
    }




    while(currentCommand !== 'print'){
        let tokens = currentCommand.split(' ');
        let command = tokens[0];
        let value = tokens[1];

        switch(tokens.shift()){
            case 'add':
                integers = add(integers, tokens);
                break;
            case 'addMany':
                integers = addMany(integers, tokens);
                break;
             case 'contains':

                 console.log(integers.indexOf(Number(tokens[0])));

                 break;
            case 'remove':
                integers = remove(integers, tokens);
                break;
            case 'shift':
                integers = shift(integers, tokens);

                break;
            case 'sumPairs':
                integers = sumPairs(integers, tokens);

                    break;
        }

        currentCommand = commands.shift();
    }
    console.log(`[ ${integers.join(', ')} ]`)
}