function ifThereIsRouteFrom(start) {
    const queue = [start];
    return {
        to(finish) {
            currentCity = queue.shift();
            if (typeof currentCity === "undefined") return false;
            for (let i = 0, len = currentCity.length; i < len; i++) {
                if (currentCity[i]['name'] === finish) return true;
                queue.push(currentCity[i]);
            }
            return this.to(finish);
        }
    }
}

/**

this is how routes object should look like

const routes = {
    0: {
        0: {
            0: {
                0: {
                    name: 'helsinki',
                    length: 0
                },
                name: 'sp',
                length: 1
            },
            1: {
                0: {
                    name: 'chelyabinsk',
                    length: 0
                },
                1: {
                    name: 'vladivostok',
                    length: 0
                },
                name: 'tumen',
                length: 2
            },
            2: {
                name: 'krasnodar',
                length: 0
            },
            name: 'kazan',
            length: 3
        },
        1: {
            0: {
                name: 'krasnodar',
                length: 0
            },
            1: {
                name: 'erevan',
                length: 0
            },
            name: 'sochi',
            length: 2
        },
        2: {
            0: {
                name: 'erevan',
                length: 0
            },
            1: {
                0: {
                    name: 'minsk',
                    length: 0
                },
                name: 'kyiv',
                length: 1
            },
            name: 'smolensk',
            length: 2
        },
        name: 'moscow',
        length: 3
    }
}

**/

// Example of usage
// const startPoint = routes[0];
// console.log(ifThereIsRouteFrom(startPoint).to('vladivostok'));