def validate(code):
    yzm=['1','0','X','9','8','7','6','5','4','3','2']
    xs=[7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2]
    s=0
    for i,v in enumerate(code):
        s+=int(v)*xs[i]
    return yzm[s%11]


if __name__=='__main__':
    cd = '34012320010101100'
    ret = validate(cd)
    print(ret)