# File: strstuff.py
# Some string stuff
#
# Matt Bishop, MHI 289I, Winter 2018

#
# read in a string
#
mystr = raw_input("Please type some text: ")
#
# print the string out letter by letter, in two different ways
#
print "First, we print each character in order:"
for i in range(len(mystr)):
    print "(" + str(i+1) + ")", mystr[i],
print "\nHere's another way:"
index = 0
for i in mystr:
    print "(" + str(index+1) + ")", i,
    index = index + 1
print "\n" 
raw_input("Type enter to continue> ")
print " " 
#
# same thing, but backwards
#
print "Next, we print each character in reverse order:" 
for i in range(len(mystr)):
    print "(" + str(i+1) + ")", mystr[-i-1],
print "\n" 
raw_input("Type enter to continue> ")
print " "
#
# now generate the reverse string
#
print "Now, let's reverse it as a string"
revmystr = ""
for i in range(len(mystr)):
    revmystr = revmystr + mystr[-i-1]
print "And it is: ", revmystr,
#
# maybe it's a palindrome; let's check ...
#
if mystr == revmystr:
    print " -- hey, it's a palindrome!"
else:
    print ""
print ""
raw_input("Type enter to continue> ")
print " "
#
# let's count and list vowels
#
print "Let's count vowels: ",
vowels = "aeiou"
vowelct = 0
vowellist = ""
for ch in mystr:
        if ch.lower() in vowels:
            vowelct = vowelct + 1
            vowellist = vowellist + ch.lower()
print "Out of", len(mystr), "characters, there are", vowelct, "vowels:", vowellist
print "That's", float(vowelct)/float(len(mystr))*100.0, "percent of the characters"
print ""
raw_input("Type enter to continue> ")
print " "
#
# now make a pyramid or two by chopping letters off from the outside in
#
# first, big to little
#
print "Now let's look at some slices:"
print mystr
for i in range(len(mystr) / 2 + len(mystr) % 2):
    if i == 0:
        continue
    print " "*(i-1), mystr[i:-i]
#
# last, little to big
#
for i in range(len(revmystr)/  2 + len(revmystr) % 2, 0, -1):
    if i == len(revmystr) / 2 + len(revmystr) % 2:
        continue
    print " "*(i-1), revmystr[i:-i]
print revmystr