group">
            <label>Filter prefix:</label>
            <input type="text" @input=${(e) => { this.prefix = e.target.value; }} />
          </div>
          <label>Contacts:</label>
          <div class="list-container">
            <select size="8"
                    @change=${(e) => { this.selectedName = this.filterNames[e.target.selectedIndex]; }}
            >
              ${this.filterNames.map(name => html`<option>${name.firstName} ${name.lastName}</option>`)}
            </select>
          </