def provjera(m,n):
    samoglasnici = ["a","e","i","o","u"]
    suglasnici = ["b","c","d","f","g","h","j","k","l","m","n","p","r","s","t","u","v","z"]
    dodatni_0 = ["s","z"]
    dodatni_1 = ["j","l","r","v"]
    x = "\-"

    if((m in samoglasnici) and (n in samoglasnici)):
        return 0
    if((m in samoglasnici) and (n in suglasnici)):
        return 1
    if((m in suglasnici) and (n in suglasnici)):
        if(m in dodatni_0):
            return 2
        else:
            if(n in dodatni_0):
                if(m in dodatni_1):
                    return 3
                else:
                    return 2
            else:
                return 3
    if((m in suglasnici) and (n in samoglasnici)):
        return 4
    if((m == x) or (n == x)):
        return 5

def ispis(x):
    for i in range(0,len(x)):
        print(x[i], end="")
    return

a = "string"
x = "\-"
b = ["k"] * len(a)

for i in range(0,len(a)):
    b[i] = a[i]

z = len(b)

for i in range(0,z+1):
    print("i je:", i)
    print("znakovi: ",b[i],b[i+1])
    if(i == 0):
        n = provjera(b[i], b[i+1])
        if((n == 3) or (n == 0)):
            b.insert(i+1,x)
            z += 1
        else:
            print("Preskoci... ")
    else:
        n = provjera(b[i], b[i+1])
        if((n == 3) or (n == 0)):
            b.insert(i+1,x)
            z += 1
        elif((n == 2) or (n == 4)):
            b.insert(i,x)
            z += 1
        elif(n == 5):
            print("Preskoci zbog \-")
        else:
            print("Preskoci... ")
    ispis(b)
    print()
    print("duzina: ", len(b))
    print()