html
<input class="people_input inp_number1" key="1" maxlength="1" placeholder="0" />
<input class="people_input inp_number2" key="2" maxlength="1" placeholder="0" />
<input class="people_input inp_number3" key="3" maxlength="1" />
<input class="people_input inp_number4" maxlength="1" key="4" />
<input class="people_input inp_number5" key="5" maxlength="1" />
<input class="people_input inp_number6" key="6" maxlength="1" /<