Extract numbers from an alpha numeric string

Hi All.

I'm doing a program in which you have to enter a series of numbers like
this: 1-3-4-11-15-8, I extract the numbers, and then transfer to a hash,
the program does is that given 2 arrays with shirt numbers, and the
names of a soccer team, should I create a hash associating both arrays.

for example if I enter 1-3-4-11, the program should return:

1 => p1
3 => p3
4 => p4
11 => p11

try removing the dashs of string, but when I pass as argument a number
greater than nine, I just passed the first number:

1 => p1
3 => p2
10 => p1
11 => p1

I mean?, here is the code:

###############################################
tshirts=["1","2","3","4","5","6","7","8","9","10","11"]
players=["p1","p2","p3","p4","p5","p6","p7","p8","p9","p10","p11"]

h={
1=>"p1",
2=>"p2",
3=>"p3",
4=>"p4",
5=>"p5",
6=>"p6",
7=>"p7",
8=>"p8",
9=>"p9",
10=>"p10",
11=>"p11"
}

h.each{|k,v|puts "#{k} => #{v}"}

def output(str,h)
  s={}
  for i in 0..str.length
  h.each{|k,v|

  if k == str[i].to_i
    #puts "#{k} ==> #{v}"
    s[i]="#{v}"
    print s[i].inspect
    #print "-"
  end

  }
  end

end

print "Enter numbers of players (ej: 1-3-11-7-15-22-4-7): "
str=gets.chomp.to_s


for i in 0..str.length-1
  if str[i]=="-"
    str[i]=""
  end
end

#puts str

output(str,h)

###################################################################

I accept any suggestion.

Thanks.

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