line=raw_input()
l = len(line)
cnt = {}
ans = ""
anscnt = 0
days = [31,28,31,30,31,30,31,31,30,31,30,31]
for i in range(0, l-9) :
    y=0
    m=0
    d=0
    if (line[i]>='0' and line[i]<='9' and line[i+1]>='0' and line[i+1]<='9') :
        d = (ord(line[i])-48)*10+ord(line[i+1])-48
    else :
        continue
    if (line[i+2]!='-') :
        continue
    if (line[i+3]>='0' and line[i+3]<='9' and line[i+4]>='0' and line[i+4]<='9') :
        m = (ord(line[i+3])-48)*10+ord(line[i+4])-48
    else :
        continue
    if (line[i+5]!='-') :
        continue
    if (line[i+6]>='0' and line[i+6]<='9' and line[i+7]>='0' and line[i+7]<='9' and line[i+8]>='0' and line[i+8]<='9' and line[i+9]>='0' and line[i+9]<='9') :
        y = (ord(line[i+6])-48)*1000+(ord(line[i+7])-48)*100+(ord(line[i+8])-48)*10+ord(line[i+9])-48
    else :
        continue
    if (y < 2013 or y > 2015 or m < 1 or m > 12 or d < 1 or d > days[m-1]) :
        continue
    
    res = str(d)+"-"+str(m)+"-"+str(y)
    if (cnt.has_key(res)) :
        cnt[res] = cnt[res] + 1
    else :
        cnt[res] = 1
    if cnt[res] > anscnt :
        anscnt = cnt[res]
        ans = res
print ans