s = str(input())

def mirror(string):
    s1 = ""
    s2 = ""
    ans = ""
    if len(string) % 2 == 0:
        s1 = string
        s2 = reversed(string)
        for w1, w2 in zip(s1, s2):
            if w1 != w2:
                ans += w1
            elif w1 == w2 == "<":
                ans += ">"
            elif w1 == w2 == ">":
                ans += "<"
                
    elif len(string) % 2 == 1:
        s1 = string
        s2 = reversed(string)
        for w1, w2 in zip(s1, s2):
            if w1 == w2 == "<":
                ans += ">"
            elif w1 == w2 == ">":
                ans += "<"
            elif w1 != w2:
                if w1 == "<":
                    ans += "<"
                elif w1 == ">":
                    ans += ">"
    return ans

print(mirror(s))