complete day 2 part 2!

day2.sh

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+#!/usr/bin/env bash
+declare -a possiblegames # create array for possible games
+declare -a power # and for game's powers
+cat $1 | while read l; do # read input
+	((i++))
+	possible=1 # assume game can be won
+	echo game $i
+	echo green
+	green=$(echo $l | grep -Po '([0-9]?[0-9](?= green))+' | while read g; do # find all the green cubes
+		echo $g
+	done | sort -n | tail -1)
+	if [[ $green -gt 13 ]]; then # test if the largest cube is bigger than 13
+		possible=0
+	fi
+
+	echo blue # the same sort of structure is used above
+	blue=$(echo $l | grep -Po '([0-9]?[0-9](?= blue))+' | while read b; do # find the blues
+		echo $b
+	done | sort -n | tail -1)
+	if [[ $blue -gt 14 ]]; then # test for above-14ers
+		possible=0
+	fi
+
+	echo red # et cetera
+	red=$(echo $l | grep -Po '([0-9]?[0-9](?= red))+' | while read r; do # find reds
+		echo $r
+	done | sort -n | tail -1)
+	if [[ $red -gt 12 ]]; then
+		possible=0
+	fi
+
+	power[$i]=`echo $green*$blue*$red | bc`
+
+	if [[ possible -eq 1 ]]; then # if game is winnable, mark down the index into the array
+		echo possible
+		possiblegames[$i]=$i
+	else
+		echo impossible
+	fi
+	echo ${possiblegames[@]} # print all the games that are valid
+	echo ${possiblegames[@]} | sed 's/ /+/g' | bc # .. and add all the array elements into the answer!
+	echo ${power[@]} | sed 's/ /+/g' | bc # .. and for game's powers!
+done
+