def main():
    perjantai = 5
    for i in range(1, 12+1):
        if i == 1:
            pvlkm = 31
        elif i == 2:
            pvlkm = 28
        elif i == 3:
            pvlkm = 31
        elif i == 4:
            pvlkm = 30
        elif i == 5:
            pvlkm = 31
        elif i == 6:
            pvlkm = 30
        elif i == 7:
            pvlkm = 31
        elif i == 8:
            pvlkm = 31
        elif i == 9:
            pvlkm = 30
        elif i == 10:
            pvlkm = 31
        elif i == 11:
            pvlkm = 30
        else:
            pvlkm = 31
        for j in range(1, pvlkm+1):
            if perjantai == 7:
                print(j,".",i,".", sep="")
            perjantai += 1
main()