from sys import stdin





def convert( a):

    num=0,
    len=a.length()-1
    while(len>=0):

        if(a[len]=='M'):
            len=len-1
            num=num+1000
            if(a[len]=='C'):
                len=len-1
                num=num-100

        if(a[len]=='D'):
            len=len-1
            num=num+500
            if(a[len]=='C'):
                len=len-1
                num=num-100

        if(a[len]=='C'):
            len=len-1
            num=num+100
            if(a[len]=='X'):
                len=len-1
                num=num-10

        if(a[len]=='L'):
            len=len-1
            num=num+50
            if(a[len]=='X'):
                len=len-1
                num=num-10

        if(a[len]=='X'):
            len=len-1
            num=num+10
            if(a[len]=='I'):
                len=len-1
                num=num-1

        if(a[len]=='V'):
            len=len-1
            num=num+5
            if(a[len]=='I'):
                len=len-1
                num=num-1


        if(a[len]=='I'):
            len=len-1
            num=num+1

        return num



def print_ans( b):


             if (b >= 4000 or b <= 0):

                 print("-")

             else:
                     while (b>0):
                        if(b>=1000):
                            print("M")
                            b=b-1000
                        else:
                            if(b>=900):
                                print("CM")
                                b=b-900
                            else:
                                if(b>=500):
                                     print("D")
                                     b=b-500
                                else:
                                    if(b>=400):
                                        print("CD")
                                        b=b-400
                                    else:
                                         if(b>=100):
                                             print("C")
                                             b=b-100
                                         else:
                                             if(b>=90):
                                                 print("XC")
                                                 b=b-90
                                             else:
                                                 if(b>=50):
                                                     print("L")
                                                     b=b-50
                                                 else:
                                                     if(b>=40):
                                                         print("XL")
                                                         b=b-40
                                                     else:
                                                         if(b>=10):
                                                             print("X")
                                                             b=b-10
                                                         else:
                                                             if(b>=9):
                                                                 print("IX")
                                                                 b=b-9
                                                             else:
                                                                 if(b>=5):
                                                                     print("V")
                                                                     b=b-5
                                                                 else:
                                                                     if(b>=4):
                                                                         print("IV")
                                                                         b=b-4
                                                                     else:
                                                                         if(b>=1):
                                                                             print("I")
                                                                             b=b-1








sum=0
for line in stdin:
    if line == '':
        break
    process( arr = [int(i) for i in input().split()]
          if(array[1]=='+'):          '''here is error on this ' : ' why i have no idea '''
              sum=convert(array[0])+convert(array[2])
          if(array[1]=='-') :
              sum=convert(array[0])-convert(array[2])
          if(array[1]=='/') :
              sum=convert(array[0])/convert(array[2])
          if(array[1]=='*') :
              sum=convert(array[0])*convert(array[2])
          print_ans(sum)
          print('\n'))