if __name__=='__main__':
    s=int(input())
    if(s%10==1 and((s//10)%10!=1)):
        print(str(s)+'st')
    elif(s%10==2 and((s//10)%10!=1)):
        print(str(s)+'nd')
    elif(s%10==3 and((s//10)%10!=1)):
        print(str(s)+'rd')
    else:
        print(str(s)+'th')
    pass