#Roman Nunmeral Converter

fin=open("DATA4.txt", "r")
num=fin.readline()

number=0


c=-1
while c<len(num)-1:
    c=c+1
    input=num.find("i")
    if num[c]=="i":
        number=number+1
        if num[c]=="v" and num[c-1]=="i" and c>=0:
            number=number-2
        if num[c]=="x" and num[c-1]=="i" and c>=0:
            number=number-2
        if num[c]=="l" and num[c-1]=="i" and c>=0:
            number=number-2
        if num[c]=="c" and num[c-1]=="i" and c>=0:
            number=number-2
        if num[c]=="d" and num[c-1]=="i" and c>=0:
            number=number-2
        if num[c]=="m" and num[c-1]=="i" and c>=0:
            number=number-2   
    if num[c]=="v":
        number=number+5
        if num[c]=="x" and num[c-1]=="v" and c>=0:
            number=number-10
        if num[c]=="l" and num[c-1]=="v" and c>=0:
            number=number-10
        if num[c]=="c" and num[c-1]=="v" and c>=0:
            number=number-10
        if num[c]=="d" and num[c-1]=="v" and c>=0:
            number=number-10
        if num[c]=="m" and num[c-1]=="v" and c>=0:
            number=number-10
    
    if num[c]=="x":
        number=number+10    
        if num[c]=="l" and num[c-1]=="x" and c>=0:
            number=number-20
        if num[c]=="c" and num[c-1]=="x" and c>=0:
            number=number-20
        if num[c]=="d" and num[c-1]=="x" and c>=0:
            number=number-20
        if num[c]=="m" and num[c-1]=="x" and c>=0:
            number=number-20
  
    if num[c]=="l":
        number=number+50       
        if num[c]=="c" and num[c-1]=="l" and c>=0:
            number=number-100
        if num[c]=="d" and num[c-1]=="l" and c>=0:
            number=number-100
        if num[c]=="m" and num[c-1]=="l" and c>=0:
            number=number-100
  
    if num[c]=="c":
        number=number+100
        if num[c]=="d" and num[c-1]=="c" and c>=0:
            number=number-200
        if num[c]=="m" and num[c-1]=="c" and c>=0:
            number=number-200
       
    if num[c]=="d":
        number=number+500
        if num[c]=="m" and num[c-1]=="d" and c>=0:
            number=number-1000
  
    if num[c]=="m":
        number=number+1000
        
print number
fout=open("OUT4.txt", "w")
fout.write(str(number))
fout.close()