def check(let):
    let = let.upper()
    valid = ["M", "D", "C", "L", "X", "V", "I"]
    for letters in let:
        if letters not in valid:
            return False
    return True

def rimtoint(str):
    str = str.upper()
    s, c, a = 0, 0, 0
    for i in str:
        c1=c
        if i == "I":
            c=1
        if i == "V":
            c=5
        if i == "X":
            c=10
        if i == "L":
            c=50
        if i == "C":
            c=100
        if i == "D":
            c=500
        if i == "M":
            c=1000
        if c > c1:
            s = -2*c1
        a = a+s+c
    return a

def inttorim(ints):
    ones = ["","I","II","III","IV","V","VI","VII","VIII","IX"]
    tens = ["","X","XX","XXX","XL","L","LX","LXX","LXXX","XC"]
    hunds = ["","C","CC","CCC","CD","D","DC","DCC","DCCC","CM"]
    thous = ["","M","MM","MMM","MMMM"]

    t = thous[ints // 1000]
    h = hunds[ints// 100 % 10]
    te = tens[ints // 10 % 10]
    o =  ones[ints % 10]
    return t+h+te+o

c = []
p = []
res = []
a = input().split()
for i in range(len(a)):
    if check(a[i]):
        c.append(a[i])
for i in range(len(c)):
    p.append(rimtoint(c[i]))
for i in range(len(p)):
    res.append(inttorim(p[i]))
for i in range(len(res)):
    print(res[i])