diff --git a/03/03.awk b/03/03.awk
new file mode 100644
index 0000000..fa80012
--- /dev/null
+++ b/03/03.awk
@@ -0,0 +1,24 @@
+NR==1{ n = length($0); print n }
+{
+ for(i=1; i<=n;i++){
+   c[i] += substr($1,i,1)
+ }
+}
+
+END{
+ print NR
+ gamma = ""
+ epsilon = ""
+ g = 0
+ e = 0
+ for(i=1; i<=n; i++){
+  gamma = gamma (c[i]>NR/2)
+  g += lshift(c[i]>NR/2,n-i)
+  epsilon = epsilon (c[i]<NR/2)
+  e += lshift(c[i]<NR/2,n-i)
+ }
+ print gamma, epsilon
+ print g, e, g*e
+# print
+
+}
diff --git a/03/03_2.awk b/03/03_2.awk
new file mode 100644
index 0000000..550f4b7
--- /dev/null
+++ b/03/03_2.awk
@@ -0,0 +1,73 @@
+NR==1{ n = length($0); }
+{
+ a[NR] = $0
+ b[NR] = $0
+ ocount += substr($1,1,1)
+}
+
+END{
+ gamma = ""
+ epsilon = ""
+ g = 0
+ e = 0
+ len = NR
+ count = ocount
+ for(nbit = 1; nbit<=n; nbit++){
+ bit = count>=len/2
+ print nbit, "bit", bit
+ delete sel
+ i=1
+ count = 0
+ for(r=1;r<=len;r++){
+	print a[r]
+	if( substr(a[r],nbit,1) == bit ){
+	  sel[i] = a[r]
+	  count  += substr(a[r],nbit+1,1)
+  	  i++
+   }
+ }
+ delete a
+ for(i=1;i<=length(sel);i++){
+	 a[i] = sel[i]
+ }
+ len = length(sel)
+ print length(sel)
+ if (len == 1)
+	break
+}
+ oxygen = sel[1]
+
+ len = NR
+ count = ocount
+ for(nbit = 1; nbit<=n; nbit++){
+ bit = count<len/2
+ print nbit, "bit", bit
+ delete sel
+ i=1
+ count = 0
+ for(r=1;r<=len;r++){
+	print b[r]
+	if( substr(b[r],nbit,1) == bit ){
+	  sel[i] = b[r]
+	  count  += substr(b[r],nbit+1,1)
+  	  i++
+   }
+ }
+ delete b
+ for(i=1;i<=length(sel);i++){
+	 b[i] = sel[i]
+ }
+ len = length(sel)
+ print length(sel)
+ if (len==1)
+  break
+}
+ co2 = sel[1]
+
+ print oxygen, co2
+ for(i=1;i<=n;i++){
+   o += lshift( substr(oxygen,i,1), n-i)
+   c += lshift( substr(co2,i,1), n-i)
+ }
+ print o, c, o*c
+}
diff --git a/03/Makefile b/03/Makefile
new file mode 100644
index 0000000..3f1cc25
--- /dev/null
+++ b/03/Makefile
@@ -0,0 +1,14 @@
+1t:
+	awk -f 03.awk test
+
+1i:
+	awk -f 03.awk input
+
+2t:
+	awk -f 03_2.awk test
+
+2i:
+	awk -f 03_2.awk input
+
+paste:
+	xclip -sel c -o > test