String Task

int main()
{
    char ch1[101];
    int l,i,j,x=1;
    scanf("%s",ch1);
    strlwr(ch1);
    l=strlen(ch1);

    for(i=0;i<l;i++)
    {
        if(ch1[i]!='a'&&ch1[i]!='e'&&ch1[i]!='i'&&ch1[i]!='o'&&ch1[i]!='u'&&ch1[i]!='y')
        {
            printf(".%c",ch1[i]);
        }
    }
    printf("\n");
    return 0;
}