import std;

void main () {
    string S = readln.chomp;
    DList!char Q;
    foreach (c; S) {
        Q.insertBack(c);
    }

    void rev (ref bool x) {
        x = x ? false : true;
    }

    bool isInc = false;

    while (!Q.empty) {
        auto head = Q.front; Q.removeFront;
        if (head == '#') {
           rev(isInc);
           continue;
        }

        if (isInc) write(head);
    }
    write("\n");
}